M4maths Previous Puzzles

18 Dec 2014 Time and Distance

A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 second respectively. The length of the train is.

OPtion

1) 45 metres
2) 40 metres
3) 54 metres
4) 50 metres
5) 64 metres
6) 72 metres
7) 60 metres
8) 74 metres
9) 70 metres
10) None of these

Solution

Let the length of train be x km & its speed be y km/hr
Then, x/(y-2) = 9/(60*60)
and x/(y-4) = 10/(60*60)
9y - 3600x = 18
and 10y - 3600x = 40
y-400x = 2 and y - 360x = 4
Therefore
40x = 2 or x = (2/40 *1000)m = 50 metres

Option 4)

Correct Option: 4 Best Solution (41)

shovan Manna   10 years AGO

here ,
9(v-2)=10(v-4)
v=22km/hr
so the length of the train is 9*(22-2)*5/18=50m

Like? Yes (62) | No (6)  

MRITUNJAY   10 years AGO

Speed and length of train is=x ,d respectively.
Relative speed of A. =x-2
relative speed of b=x-4
so equate with time
9/3600=d/x-2
10/3600=d/x-4
after solve d=50 metre

Like? Yes (15) | No (2)  

Surit Datta   10 years AGO

Let train speed be s
1st person's speed,s1 = 2km/hr =2*(5/18)=5/9 m/sec
2nd person's speed,s2 = 4km/h = 4*(5/18)=10/9 m/sec

Length of train,d = (s-s1)*t1 or (s-s2)*t2
so, (s-5/9)* 9 = (s-10/9)* 10 [t1=9sec, t2=10sec]
s=55/9 sec

Now,take 1st eq.
s-s1= d/t1 [bcz, Speed=Dis/Time]
(55/11)-(5/9)=d/9
Therefore we get d(length of train)=50m
option 4
That's it.

Like? Yes (12) | No (3)  

lakshmi   10 years AGO

Let the length of the train be x km and its speed y km/hr. Then, speed relative to first man = (y-2) km/hr.
Speed relative to second man = (y-4) km/hr.

x/y−2=9/60×60 and x/y−4=10/60×60

9y - 18=3600x or 10y - 40=3600x
So, 9y-18=10y-40 or y =22

x/22−2=93/600 or x = 20×9/3600=1/20

= (1/20×1000)m = 50 m

Like? Yes (13) | No (6)  

Sanu Panji   10 years AGO

1st person: rate = 2 kmph= 5/9 mps
2nd person: rate= 4 kmph= 10/9 mps
say length of the train is X
and speed of the train is Y mps

so, Y=(X/9)+(5/9)...............(i)
and Y=(X/10)+(10/9)..........(ii)

solving we get X= 50 metres

Like? Yes (7) | No   

Jaspalsingh Parmar   10 years AGO

speed=dist/tym
2 kmph = ( 2 x 5 ( m/sec = 5 m/sec.
18 9
4 kmph = ( 4 x 5 ( m/sec = 10 m/sec.
18 9
Let the length of the train be x metres and its speed by y m/sec.

Then, ( x ( = 9 and ( x ( = 10.
y - 5
9
y - 10
9
Therefore 9y - 5 = x and 10(9y - 10) = 9x

=> 9y - x = 5 and 90y - 9x = 100.

On solving, we get: x = 50.

Therefore Length of the train is 50 m.

Like? Yes (6) | No   

sravya   10 years AGO

let xmts for train and speed ym/sec..
1st man speed is 2*5/18=5/9m/sec
2nd man speed is 4*5/18=10/9m/sec
x/(y-5/9)=9sec-------------------1eqn
x/(y-10/9)=10sec----------------2ndeqn
solving bth x=50mts...ans...

Like? Yes (7) | No (2)  

Chirag Ranjan Lahiri   10 years AGO

9y - 5 = x and 10(9y - 10) = 9x
=> 9y - x = 5 and 90y - 9x = 100.
we get: x = 50.
Therefore Length of the train is 50 m

Like? Yes (7) | No (3)  

K.ARun   10 years AGO

2kmph=2*5/18 m/sec=> 5/9m/sec
4kmph=4*5/18 m/sec=>10/9m/sec

x/(y-(5/9))=9 and x/(y-(10/9))=10

on solving we get x=50m

Like? Yes (5) | No (2)  

Devendra Marghade   10 years AGO

If length of the train=x & its speed=y, then
Time to cross 1st person= x/(y-2) =9/3600 ---(i) &
Time to cross 2nd person=x/(y-4) =10/3600 ---(ii)
On solving (i) & (ii), x=2/40 Km =2*1000/40=50 meters

Like? Yes (4) | No (1)  

Shreya Banerjee   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec

Let the length of train is x metre and speed is y m/sec

then,
x/(y−5/9)=9
= >9y−5=x
=>9y−x=5.....(i)
And,
x/(y−10/9) =10
=> 90y−9x=100.....(ii)
from (i) and (ii), we get, x=50.

So answer is 50 metres

Like? Yes (5) | No (2)  

sonali soni   10 years AGO

consider speed of train is s
and we know that d = s*t
d= (s-2)*9/60 ----------(1) relative speed
d= (s-4)*10/60----------(2) relative speed
(1) = (2) because distance is same
9 *s - 18 = 10*s - 40
s = 22 km/h

from eq (1)
d = (22-2)*5/18 *9
d = 50 meter

Like? Yes (3) | No   

Rats   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec
Let the length of the train be x metres and its speed be y m/sec.

Therefore 9y - 5 = x and 10(9y - 10) = 9x

=> 9y - x = 5 and 90y - 9x = 100.

On solving, we get: x = 50.

Therefore Length of the train is 50 m.

Like? Yes (2) | No   

rupesh   10 years AGO

2kmph=5/9 m/sec,4kmph=10/9m/sec
length of train=x;speed of train=y
x/y-5/9=9,x/y-10/9=10
9y-x=5.....1st eq
90y-9x=100.... 2nd eq
frm 1 n 2
x=50

Like? Yes (2) | No   

purushothama   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec

Let the length of train is x metre and speed is y m/sec

then,
xy−59=9=>9y−5=x=>9y−x=5.....(i)Also,xy−109=1090y−9x=100.....(ii)from (i) and (ii), we get,x=50

Like? Yes (2) | No (1)  

ITHA Naresh Babu   10 years AGO

Answer : Option 4

Explanation :

Let x is the length of the train in meter and v is its speed in kmph

x/9 = ( v-2)(10/36) ---(1)

x/10 =( v-4) (10/36) --- (2)


Dividing equation 1 with equation 2

10/9 = (v-2)/(v-4)

=> 10v - 40 = 9v - 18

=> v = 22

Substituting in equation 1, x/9 = 200/36 => x = 9×200/36 = 50 m

Like? Yes (2) | No (1)  

jayalakshmi   10 years AGO

Let the length of the train be x km and its speed y km/hr. Then, speed relative to first man = (y-2) km/hr.
Speed relative to second man = (y-4) km/hr.

x/y−2=9/60×60 and x/y−4=10/60×60

9y - 18=3600x or 10y - 40=3600x
So, 9y-18=10y-40 or y =22

x/22−2=93/600 or x = 20×9/3600=1/20

= (1/20×1000)m = 50 m

Like? Yes (1) | No   

veeranjaneyulu   10 years AGO

d=sxt

Like? Yes (1) | No   

Mahantesh Desai   10 years AGO

x/(y-5/9) = 9 and x/(y - 10 /9) = 10
9y - 5 =x 10(9y-10) = 9x => 9y - x = 5 and 90y - 9x =100
on solving we get x = 50
The length of train is 50m

Like? Yes (1) | No   

kumari jyoti   10 years AGO

let the length of the train is x and it's speed is s. then,
to pass the 1st person, the train will have to cover (x+2*9*5/18)m in given 9 secs. i.e.,{(x+2*9*5/18)/s}=9....(1).
again,to pass the 2nd person, the train will have to cover(x+4*10*5/18)m in given 10 secs. i.e., {(x+4*10*5/18)/s}=10....(2).
solving equation 1 &2, we get,x= 50 m.

Like? Yes (1) | No   

khushboo goenka   10 years AGO

let rain speedis x and 2kmph=5/9 mps
and 4kmph=10/9mtps
so,
thn x-5/9=lngth of train /9
x-10/9=lnth of train/10

Like? Yes (1) | No   

Rajat Rokade   10 years AGO

answer is 50 metres i.e. option 4.

Like? Yes (2) | No (1)  

Rahul Kingdon   10 years AGO

Explanation:

2 kmph = ( 2 x 5 ( m/sec = 5 m/sec.
18 9
4 kmph = ( 4 x 5 ( m/sec = 10 m/sec.
18 9
Let the length of the train be x metres and its speed by y m/sec.

Then, ( x ( = 9 and ( x ( = 10.
y - 5
9
y - 10
9
Therefore 9y - 5 = x and 10(9y - 10) = 9x

=> 9y - x = 5 and 90y - 9x = 100.

On solving, we get: x = 50.

Therefore Length of the train is 50 m.

Like? Yes (1) | No   

Raj   10 years AGO

2 kmph = (2*5/18)m/sec =5/9 m/sec
4 kmph = (4*5/18)m/sec =10/9 m/sec
Let the length of the train be 'x' metres & its speed by 'y' m/sec-

then,
(x / y-5/9)=9
=> 9y-5=x
=> 9y-x=5 .....(i)

(x / y-10/9)=10
=> y-9x= 100..... (ii)
now we get from (i) n (ii) is 50 of train length

Like? Yes (1) | No   

sreedhar   10 years AGO

2 kmph = ( 2 x 5 ( m/sec = 5 m/sec.
18 9
4 kmph = ( 4 x 5 ( m/sec = 10 m/sec.
18 9
Let the length of the train be x metres and its speed by y m/sec.

Then, ( x ( = 9 and ( x ( = 10.
y - 5
9
y - 10
9
Therefore 9y - 5 = x and 10(9y - 10) = 9x

=> 9y - x = 5 and 90y - 9x = 100.

On solving, we get: x = 50.

Therefore Length of the train is 50 m.

Like? Yes (1) | No   

Vinay Sipani    10 years AGO

let the length of train be 'L'm and speed be 's' m/s

The length of persons is negligible.Their speed are 2 kmph and 4 kmph.
In m/s,their speeds are 0.55 m/s and 1.11 m/s.

Time taken for train to overtake is given by
L/(s-x) = t where x represents speed of person.

We have,
L/(s-0.55)=9 => s = 0.55 + (L/9) and
L/(s-1.11)=10 => s = 1.11 + (L/10)

Equating both, we get L = 50 m

Like? Yes (1) | No (1)  

Ashwin Dinesh   10 years AGO

10l + 50 = 9l + 100
So l = 50
which is option 4)

Like? Yes (5) | No (5)  

Supriya Mondal   10 years AGO

let length of the train is x m,
then the train goes in 9 sec is=(20/36)*9+x m
and it goes in 10 sec is=(40/36)*10+x m

so we can write,
((20/36)*9 + x)/9=((40/36)*10 + x)/10

by solving this equation we get x=50m
so option 4)50m is the correct answer

Like? Yes (1) | No (1)  

madhusudhanreddy   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec

Let
the length of train is x metre and
speed is y m/sec
then,
xy−59=9
=>9y−5=x
=>9y−x=5.....(i)
Also,xy−109=1090y−9x=100.....(ii)
from (i) and (ii),
we get,x=50
so,the length of the train is 50m.

Like? Yes (1) | No (1)  

poornima    10 years AGO

2 kmph = (2 x 5 /18)m/sec =5/ 9m/sec
4 kmph =( 4 x 5 /18)m/sec = 10/9 m/sec.
Let the length of the train be x metres and its speed
by y m/sec.
Then,
9 y - 5 = x and 10(9 y - 10) = 9 x
ans X=50mtrs

Like? Yes (1) | No (1)  

POOJA SINGH   10 years AGO

2 kmph = 5/9m/s
4kmph=10/9m/s
Let the length of the train be x m and its speed be y m/sec.
x /(y-(5/9))=9 and x/(y-(10/9))=10
9y - 5 = x and 10(9y - 10) = 9x
=> 9y - x = 5 and 90y - 9x = 100.
On solving, we get: x = 50.
Therefore Length of the train is 50 m.

Like? Yes (1) | No (1)  

Tania Mondal   10 years AGO

Let the length of the train be x metres and its speed by y m/sec.
x/(y-5/9)=9
and
x/(y-10/9)=10

Therefore 9y - 5 = x and 10(9y - 10) = 9x

9y - x = 5 and 90y - 9x = 100.

So x = 50.

Therefore Length of the train is 50 m...

Like? Yes (1) | No (1)  

Vijaya Kumar Bathini   10 years AGO

Converting Km/hr to M/sec

(2*5)/18 = 5/9 m/sec
(4*5)/18 = 10/9 m/sec

Let Length of train be X M/sec and Speed is Y M/sec

Time = distance/speed

9 = x/(y-5/9) -> 9x/9y-5 =81 -> 9y-5 =X
10 = X/(y-10/9) ->10(9Y-10) = X

Solving these we get X=50 m

Like? Yes (1) | No (1)  

Narra Sirisha   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec
9y-5 = x \
=> 9y-x = 5 .....(i)
90y-9x = 100 .....(ii)
from (i) and (ii), we get
x=50

Like? Yes (1) | No (1)  

MRITUNJAY KUMAR   10 years AGO

Option)4

Like? Yes (1) | No (1)  

sravani   10 years AGO

let length of the train be X
Speed be Y.
Relative speed with the first person in m/sec is y-5/9
Relative speed with the second person in m/sec is y-10/9
so,(y-5/9)*9 =X
and (y-10/9)*10=X
solving these
y=55/9
substitute in any of the eq
we get,
X=50meters...

Like? Yes (1) | No (2)  

Pramod Gaikwad   10 years AGO

answer is option 4) 50m

Like? Yes (1) | No (2)  

Nupur   10 years AGO

L/ (x-2) *5/18 = 9
L/ (x-4) *5/18 = 10

Solving the two we get that L = 50

Like? Yes (1) | No (2)  

shubham   10 years AGO

let speed of the train be s m/s and its length be=l.
speed of person 1=2kmph=5/9 m/s
speed of person 2=4kmph=10/9 m/s
so we have,
l/(s-5/9)=9--------(eq1)
and

l/(s-10/9)=10-------(eq2)
solving both of these we get,s=55/9 m/s.

substituting this value in eq1,we get,
l=50metres i.e.4th option

Like? Yes (1) | No (2)  

sanjeev kumar   10 years AGO

50 m

Like? Yes (1) | No (2)  

Rahul Rathod   10 years AGO

First person speed = 2*(5/18) = 5/9 m/sec
Second person speed = 4*(5/18) = 10/9 m/sec
Let the length of train is x metres and speed is y m/sec
then,
x/(y-(5/9))=9
and
x/(y-(10/9))=10
so
we get
9y-x=5
90y-9x=100
by solving we get x=50m
answer is 50m option 4)

Like? Yes (1) | No (3)  

16 Dec 2014 Numbers

Smallest number having 2, 3, 5 and 7 as its multiple and divisible by 100 will be:

OPtion

1) 210
2) 21000
3) 4200
4) 105
5) 42000
6) 420
7) 2100
8) 1050
9) 10500
10)6300

Solution

HCF of 2, 3, 5, 7 & 100 = 2100

Option 7)

Correct Option: 7 Best Solution (54)

Yekollu Muneeswar   10 years AGO

ans 2100
2100=2*1050
2100=3*700
2100=5*420
2100=7*300

2100/100=21
option 7)

Like? Yes (4) | No   

K.ARun   10 years AGO

2100 is the least number as per the givne option which is a multiple of 2,3,5 and 7... and also divisible by 100

Like? Yes (3) | No   

M SRAVANI   10 years AGO

smallest no available are 210,420,105,1050,2100 in these only 2100 is only divisible by 100,2,3,5,7

Like? Yes (3) | No   

Vinay Sipani    10 years AGO

LCM of 2 , 3 , 5 and 7 is 210

Let the number be 210x
210x is divisible by 100

=> 210x = 2100 is the smallest number

Like? Yes (3) | No (1)  

ITHA Naresh Babu   10 years AGO

2*3*5*7*10

Like? Yes (2) | No   

Rats   10 years AGO

2100=2*1050
2100=3*700
2100=5*420
2100=7*300
and is also divisible by 100..,

Like? Yes (2) | No   

Surit Datta   10 years AGO

just L.C.M those numbers
2,3,5,7
which is 210
as divisible by 100
so the number is
2100
option 7
that's it.

Like? Yes (2) | No   

kumari jyoti   10 years AGO

the smallest no divisible by 2,3,5,7 will be 2*3*5*7=210.
also the no has to be divisible by 100. so the required no is the one that is a multiple of 210 and divisible by 100. so, the answer is 2100.

Like? Yes (2) | No   

Anjali   10 years AGO

LCM of 2,3,5,7 =210
and to satisfy divisibility by 100 criteria its 2100

Like? Yes (2) | No   

Sravanthi   10 years AGO

2100 is divisible by 100
and have 2,3,5,7 as its multiples

Like? Yes (1) | No   

sneha samanta   10 years AGO

LCM of 2,3,5,7 = 210

2100 is the smallest multiple of 210 which is divisible by 100

Like? Yes (1) | No   

sanjeev kumar   10 years AGO

Ans 7

Like? Yes (1) | No   

sravani   10 years AGO

2*3*5*7=210
but must be divisible by 100 so,
210*10=2100...

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

LCM of 2,3,5,7 =210
210*10=2100
This is divisible by 100
Ans. 2100

Like? Yes (1) | No   

llamar   10 years AGO

lcm of (100,2*3*5*7)=2100

Like? Yes (1) | No   

Ashwin Dinesh   10 years AGO

that was simple :)

Like? Yes (2) | No (1)  

Biswajit Saha   10 years AGO

option 7

Like? Yes (1) | No   

BHASKAR MANDAL   10 years AGO

2*3*5*7 = 210
210*10 = 2100
option 7

Like? Yes (1) | No   

Rahul Rathod   10 years AGO

answer is 2100

Like? Yes (1) | No   

Jigyasa Kumar   10 years AGO

this is divisible by all those nos.

Like? Yes (1) | No   

MRITUNJAY   10 years AGO

Lcm of 2 3 5 7 is 210.
Smallest number multiple and divisible by 100 is 2100.

Like? Yes (1) | No   

Rajat Rokade   10 years AGO

2100 is smallest number divisible by 3, 5, 7 and 100

Like? Yes (1) | No   

abhilasha   10 years AGO

2100 is divisible by all those nos.

Like? Yes (1) | No   

Pinaki Ghosh   10 years AGO

2*3*5*7 = 210
& it is not divisible by 100
so 2100 is divisible by 100

Like? Yes (1) | No   

shovan Manna   10 years AGO

lcm of 2,3,5,7 is 210.
so that smallest no. divisible by 100 will be 2100

Like? Yes (1) | No   

Boddu Vijay   10 years AGO

2100 is divisible by 100 and multiples also satisfied

Like? Yes (1) | No   

Arul Shaijan   10 years AGO

Ans: 2100

Like? Yes (1) | No   

Sukanya   10 years AGO

2*3*5*7=210 but its not multiple of 100 so the answer is2100

Like? Yes (1) | No   

rajesh   10 years AGO

we can predict by trial and error method

Like? Yes (1) | No   

Akshay   10 years AGO

2*3*5*7=210
should br divisible by 100 tt,so smallest number=2100

Like? Yes (1) | No   

karthiga   10 years AGO

2*3*5*7=210; which is divide by 100. so the number is 2100

Like? Yes (1) | No   

mansi garg   10 years AGO

the smallest number divisible by 100 and factor of 210 is 2100

Like? Yes (1) | No   

anuj gupta   10 years AGO

2100

Like? Yes (1) | No   

uma   10 years AGO

common multiple of 2 3 5 7 is 210 and 2100 is smallest num to be divisible by 100

Like? Yes (1) | No   

JITENDRA PRATAP SINGH   10 years AGO

lcm of 2,3,5,7 is 210. 210 has 2,3,5,7,as its multiple or factor..but it is not divisible by 100.
further if 210 is divisible by 2,3,5,7 then (k*210) will also be divisible by 2,3,5,7,where k is an positive integer.
so to satisfy condition smallest value of k is 10.
so,required number=10*210=2100.

Like? Yes (1) | No   

nitin Maheshwari   10 years AGO

22111

Like? Yes (1) | No   

Ranjan   10 years AGO

2100

Like? Yes (1) | No   

Mithun Kumar Kesari   10 years AGO

2100

Like? Yes (1) | No   

Mahantesh Desai   10 years AGO

2*3*5*7 =210 but it is not divisible by 100
so smallest number that has multiplies 2,3,5,7 an ddivisible by 100 is 2100
i.e option 7

Like? Yes (1) | No   

Sambar Naresh   10 years AGO

LCM of 2,3,5,7 is 210....so 210 has 2,3,5,7 as its multiples....but it is not divisible by 100
2100 is multiple of 210 and divisible by 100
so 2100 is the correct option for it....

Like? Yes (1) | No   

revathi   10 years AGO

option verification

Like? Yes (1) | No   

khushboo goenka   10 years AGO

no will be multiple of 210
and it will be 2100

Like? Yes (1) | No   

abbas haider   10 years AGO

because 2100= 3*7*2*5=210*10=2100 and 2100 is always divisible by 100

Like? Yes (1) | No   

veeranjaneyulu   10 years AGO

2,3,5,7 are multiples of 2100 and divisible by 100

Like? Yes (1) | No   

A M ANKIT KALLURAYA   10 years AGO

find lcm...and use trial by error

Like? Yes (1) | No   

pramod nawale   10 years AGO

2100 is divisible by 2,3,5,7 as their lcm 210 also divids 2100 which is divisible by 100.......

Like? Yes (1) | No   

mathscrazy   10 years AGO

l.c.m of 2,3,5,7 is 210...that means we have to check least multiple of 210(or we can check multiple of 21) which is divisible by 100 i.e. 2100...

Like? Yes (1) | No   

Shiv Kumar   10 years AGO

2100 is the least/Smallest number which is devisible by 100 and multiple of 2,3,5 and 7

Like? Yes (1) | No   

Nupur   10 years AGO

LCM of 2, 3 , 5, 7, 10 = 2100

Like? Yes (1) | No   

sreedhar   10 years AGO

To divisible by hundreed last two places must be zero and smallest is 2100

Like? Yes (1) | No   

VENKATA JAGADEESH KANCHI   10 years AGO

all are prime numbers.., the lcm of whole numbers is 210 and least number divisible by 100 is 2100

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

For a no to be divisible by 100, it should have atleast two zeros at its last.
Also, no having 2,3,5,7 as its multiple should be atleast equal to 2*3*5*7 = 210 or a multiple of 210.
The least no satisfying these two conditions is 2100. Ans.

Like? Yes (1) | No   

Anil Kumar Telikicherla   10 years AGO

2100 is the smallest number that satisfies all the conditions

Like? Yes (1) | No   

Supriya Mondal   10 years AGO

We know that l.c.m of 2,3,5,7 is=210
so,answer will be 2100 which is divisible by 100

Like? Yes (1) | No (1)  

15 Dec 2014 sequence

next number of the sequence
1, 41, 16441, 6576416441, ..........

OPtion

1) 263056657646576416441
2) 343056676436576416441
3) 458686420956576416441
4) 345648668856576416441
5) 328820822056576416441
6) 394584986466576416441
7) 460349150876576416441
8) 458568669556576416441
9) 498598654986576416441
10)none of these

Solution

1
do it 4 times we get 4
now we have 4 and 1 so 41
do 41 4 times we get 164
now we have 164 and 41so 16441
similarly

Correct Option: 1 Best Solution (69)

K.ARun   10 years AGO

Multiply the prev no by 4 and add (join) the prev result digits at the end
1,
1*4=4"1"--> 1 is the prev digit
41*4=164"41"--> 41 is the prev digit
16441*4=65764"16441"--> 16441 is the prev digit
6576416441*4=26305665764"6576416441" is the prev digit
So Option 1..

Like? Yes (5) | No (1)  

sravani   10 years AGO

1
1*4=4 =>41
41*4=164 =>16441
16441*4=65764 =>6576416441
6576416441 *4=26305665764 =>263056657646576416441...is the answer...

Like? Yes (4) | No (1)  

anuj gupta   10 years AGO

4*1=41
41*4=16441
16441*4=6576416441
6576416441*4=263056657646576416441

Like? Yes (2) | No   

Surit Datta   10 years AGO

According to the question
the 2nd number has two parts
1st part is the number multiple by 4
2nd part is the number itself
example:-
1
next number
1st part = 1*4 = 4
2nd part = 1
so the next number after 1 is 41
like this way we get our appropriate result .
that's it.
Option 1.

Like? Yes (1) | No   

Rahul Rathod   10 years AGO

1*4=4(1)
41*4=164(41)
16441*4=65764(16441)
similarly
6576416441*4= 26305665764(6576416441)
so answer is option 1)

Like? Yes (2) | No (1)  

Vinay Sipani    10 years AGO

option 1

Number of digits in 6576416441 is 10

Next term = 6576416441[4*10^10 + 1]

If number of digits in nth term = k
=> (n+1)th term = nth term * (4*10^k + 1)

Like? Yes (1) | No   

Rajat Rokade   10 years AGO

In this sequence,
1*4 +1=41
41*4 +41=16441
16441*4 +16441=6576416441
6576416441*4 +6576416441=263056657646576416441
So
option 1 is correct.

Like? Yes (1) | No   

Supriya Mondal   10 years AGO

1 st number is 1
then multiply 1 with 4 and write it before 1
so, it will be 41,which is the 2nd number of the series.
then multiply 41 with 4 and write it before 41
so,it will be 16441, which is the 3rd number of the series.
then multiply 16441 with 4 and write it before 16441
so,it will be 6576416441, which is the 4th number of the series.
then multiply 6576416441 with 4 and write it before 6576416441
so,it will be 263056657646576416441, which is the answer

Like? Yes (1) | No   

Pramod Gaikwad   10 years AGO

In this sequence,
1*4 +1=41
41*4 +41=16441
16441*4 +16441=6576416441
6576416441*4 +6576416441=263056657646576416441





option 1 is correct.

Like? Yes (1) | No   

Sravanthi   10 years AGO

1
(1*4) 1=41
(41*4) 41=16441
(16441*4) 16441=6576416441
(6576416441*4) 6576416441=263056657646576416441

Like? Yes (1) | No   

Abhishek mani   10 years AGO

6576416441*4= 26305665764 next digit 6576416441

Like? Yes (1) | No   

Sanu Panji   10 years AGO

(4*previous no)(previous no)
so,

1
(4*1)(1)= 41
(4*41)(41)= 16441
(4*16441)(16441)= 6576416441
(4*6576416441)(6576416441)= 263056657646576416441

so option (1) is correct

Like? Yes (1) | No   

ravi prakash   10 years AGO

4*4=16+0=16
16*4=64+1=65
65*4=260+3=263

Like? Yes (1) | No   

sneha samanta   10 years AGO

1st digit 1 = 1 digit,taking (4*10 as multiplier)
2nd digit 41 = 2 digit,taking (4*100 as multiplier)
3rd digit 16441 = 5 digit,taking (4*100000 as multiplier)
4th digit 6576416441 = 10 digit,taking (4*10000000000 as multiplier)

sequence:
1st digit = 1
2nd digit = 1*40 + 1
3rd digit = 41*400 + 41
4th digit = 16441*400000 + 16441
5th digit = 6576416441*40000000000 + 6576416441

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Ajinkya Kulkarni   10 years AGO

(4X)(X)

Like? Yes (1) | No   

Pradeep   10 years AGO

1) 263056657646576416441
as 1*41 =41
41*401=16441
16441*400001=6576416441
6576416441*4000000001=263056657646576416441

Like? Yes (1) | No   

Rats   10 years AGO

1
41=(4*40)+4=164 =>16441
16441=(1644*40)+4=65764 =>6576416441
6576416441=(657641644*40)+4=26305665764
=>263056657646576416441........Ans

Like? Yes (1) | No   

Nupur   10 years AGO

1*4 = 4
41 = 4*1 + last no

16441 = 4*41 + last no
similarly 16441*4 + last no = 26305665764 + 6576416441

Like? Yes (1) | No   

Biswajit Saha   10 years AGO

(4*1)1 , (41*4)41, (16441*4)16441, ......

Similarly..
(6576416441*4)6576416441 = 263056657646576416441
Ans: Option 1)

Like? Yes (1) | No   

Manasa Kotha   10 years AGO

multiply the prev no by 4
and join the prev digit with the result of them at the end

Like? Yes (1) | No   

gowtham   10 years AGO

1*1=1
4*1=41
41*4=16441 taking 2^nd step to 3^rd step vice-visa
16441*4=6576416441
6576416441*4=263056657646576416441

option(1)

Like? Yes (1) | No   

Nitish Kumar Dubey   10 years AGO

1*4=4----------1 should be placed at ones place-------------------41
4*41=164------41 should be placed -16441
16441*4=65764
and So on...

Like? Yes (1) | No   

navya   10 years AGO

16441=(41*4)41=(164)41
(16441*4)16441=6576416441
similarly (6576416441*4)657616441=263056657646576416441

Like? Yes (1) | No   

g.soujanya   10 years AGO

1
1X4=4
41X4=164
16441X4=6576416441
6576416441X4=26305665764

Like? Yes (1) | No   

Arijit Acharyya   10 years AGO

next no = (previous no * 4)(next no)

Like? Yes (1) | No   

Sandeep Kumar   10 years AGO

order is like that..
(previous number*4)(previous number)
so,
(6576416441*4)(6576416441) = 2630566576416441

Like? Yes (1) | No   

MRITUNJAY   10 years AGO

1*4=4'1'
41*4=164'41'
16441*4=65764'16441'
6576416441*4=263056'6576416441'
this is the answer

Like? Yes (1) | No   

shovan Manna   10 years AGO

41=(4*1)1
16441=(4*4)(1*1)41
6576416441=(4*16)(4*44)(4*1)16441
=(64+1)(76)(4)16441
263056657646576416441=(4*6)(4*57)(4*64)(4*16)(4*44)(4*1)6576416441
=(24+2)(28+2)56(64+1)764 6576416441

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Zeeshan Ahmad Rehmani   10 years AGO

I very Weak of Maths

Like? Yes (1) | No   

Anubhav jain   10 years AGO

ANS

Like? Yes (1) | No   

prem   10 years AGO

1
mul 4=4and last digit remain 1
then next no=41
now 41
is the last two digit for the next no
but multiply 4 with 41 =164 it is the before two digit no hence next no is 16441
now 1641 is last 4 digit and multiply with 4 in this no for next digit
6576416441
hence next no is..........
263056657646576416441

Like? Yes (1) | No   

Mahantesh Desai   10 years AGO

1*4 = 41
41 * 4 = 16441
16441* 4 = 6576416441
6576416441*4 = 263056657646576416441

Like? Yes (1) | No   

Priyanksha   10 years AGO

1*4=4 and den put 1 after 4 that is 41

Like? Yes (1) | No   

Yogeshkumar   10 years AGO

1*4=4 and join the previous number 1 =41

41*4=164 and join the previous number 41 =16441

16441*4=65764 and join the previousnumber16441=6576416441

6576416441*4=263056665764 and join the previous number 6576416441 and so answer is =2630566657646576416441

Like? Yes (1) | No   

abbas haider   10 years AGO

First no is copies as it is then that number is multiplied by 4 for finding the remaining numbers....

Like? Yes (1) | No   

Prameela Saragadam   10 years AGO

1*4=4 --> 41
41*4=164 -->16441
16441*4=65764 --> 6576416441

Like? Yes (1) | No   

Narasimharao Pulibandla   10 years AGO

1(4*1) followed by 1 = 41
(4*41) followed by 41 = 16441(4*16441)
followed by 16441 = 6576416441 similarly next number should be (4*6576416441)
followed by 6576416441 = 263056657646576416441

Like? Yes (1) | No   

dhanaseelan   10 years AGO

(1*4)1=41
(41*4)41=16441
like this option 1 is correct

Like? Yes (1) | No   

Aparna Bhattacharya   10 years AGO

1
(4*1) followed by 1 = 41
(4*41) followed by 41 = 16441
(4*16441) followed by 16441 = 6576416441
similarly next number should be (4*6576416441) followed by 6576416441 = 263056657646576416441
Option: 1

Like? Yes (1) | No   

saranya   10 years AGO

1*4=4(1 )
41*4=164(41)
16441*4=65764(16441)
6576416441*4=263056(6576416441)

Like? Yes (1) | No   

AnveshAnchula   10 years AGO

the number sequence is in such a way that each number is multiplied by 4 and then the multiplied resulted number and the number which is multiplied is combined to form a next sequence number......
1,(4*1=4)&1 =41,(41*4=164)&41=16441,and so on.........

Like? Yes (1) | No   

shubham   10 years AGO

(6576416441*4)concatenated with previous no. 6576416441 to produce the result I.e. 263056657646576416441

Like? Yes (1) | No   

Sandrapati G Lakshmi Durga Prasanna   10 years AGO

next number end with the 4 appended with previous number

Like? Yes (1) | No   

sanketa b s   10 years AGO

41 at the end is common .. n 4*4 =16 so 16 , 16*4=64+1=65 , n 65*4=260+3=263

Like? Yes (1) | No   

Hemaprathap Reddy   10 years AGO

41*4=164+41=164(41);
16441*4=65764(previous number)=6576416441;
6576416441*4=26305665764(previous num)=1st option

Like? Yes (1) | No   

vinod kumar   10 years AGO

1
(4*1) followed by 1 = 41
(4*41) followed by 41 = 16441
(4*16441) followed by 16441 = 6576416441
similarly next number should be (4*6576416441) followed by 6576416441 = 263056657646576416441

Like? Yes (1) | No   

Jigyasa Kumar   10 years AGO

multiply last no. by 4

Like? Yes (1) | No   

abhilasha   10 years AGO

4* last no.

Like? Yes (1) | No   

K.NagaSugunaManasa   10 years AGO

1
(4*1)1=41
(4*41)41=16441
(4*16441)16441=6576416441
(4*6576416441)6576416441=263056657646576416441
so option is 1

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

41*401=16441
16441*400001=6576416441
6576416441*400000001=263056657646576416441
Ans ob 1.

Like? Yes (1) | No   

divyasri   10 years AGO

1 (4*1) followed by 1 = 41 (4*41) followed by 41 = 16441 (4*16441) followed by 16441 = 6576416441. similarly next number should be (4*6576416441)

Like? Yes (1) | No   

Navya   10 years AGO

1*4=4 ,41
41*4=164,16441
16441*4=65764,6576416441
6576416441*4=2630566576416441

Like? Yes (1) | No   

shrivithya.p   10 years AGO

Ans 263056657646576416441

Like? Yes (1) | No   

Abhishek Porwal   10 years AGO

1(4*1) followed by 1 = 41
(4*41) followed by 41 = 16441
(4*16441) followed by 16441 = 6576416441
Similarly
(4*6576416441) followed by 6576416441 = 263056657646576416441

Like? Yes (1) | No   

RIANKA SARKAR   10 years AGO

the digits in the previous number is multiplied by 4 to get the next number

Like? Yes (1) | No   

niranjana   10 years AGO

2nd nos 41 is multiplied by 4 we get 164
join 2nd nos at the end of 164 we get 16441(3rd nos)
3rd nos *4=6576416441(4th nos)
4th nos *4 we get option 1

Like? Yes (1) | No   

sneha sri   10 years AGO

as we observe the sequence
1
sec no is obtained by combining 1×4 and 1×1 I.E 41
3rd no is by combining 41×4 and 41×1 I.e 16441
4th no by combining 16441×4 and 16441×1 I.e 6576416441 let it be y
next no by combining y×4 and y×1I.e 263056657646576416441

Like? Yes (1) | No   

saritha   10 years AGO

1
(4*1) followed by 1 = 41
(4*41) followed by 41 = 16441
(4*16441) followed by 16441 = 6576416441
similarly next number should be
(4*6576416441) followed by 6576416441 = 263056657646576416441

Like? Yes (1) | No   

Rishabh   10 years AGO

answer is option 1.
6576416441*4 = 26305665764 and placed pervious number after it becomes 263056657646576416441.

Like? Yes (1) | No   

Udhaya kumar   10 years AGO

a * 4_(n-1) 0's_1
where a is previous no
n is number of digits in previous no...
6576416441 * 40000000001 = 263056657646576416441........

Like? Yes (1) | No   

madhusudhanreddy   10 years AGO

(4*1)followed by 1 = 41
(4*41) followed by 41 = 16441
(4*16441) followed by 16441 = 6576416441
similarly next number should be (4*6576416441) followed by 6576416441 = 263056657646576416441

Like? Yes (1) | No   

Siddhartha Dasgupta   10 years AGO

1st Digit 1
41=last digit is 1 and 1st digit is x4 so 41
16441=41x4=164 so third number is 16441
6576416441=16441x4 concat previous number i.e 6576416441

so next number is 6576416441x4=26305665764concat previous result i.e 6576416441
so answer is 1)263056657646576416441

Like? Yes (1) | No   

ajay chowdary   10 years AGO

1,
1*4=4 41 put 4 at the front of 1
41*4=164 16441 put 164 at begining of previous no.
16441*4= 65764 6576416441
657641441*4=26305665764 263056657646576441

Like? Yes (1) | No   

Priya Dharshini   10 years AGO

Like? Yes (1) | No   

subba lakshmi kunduru   10 years AGO

multiply 1 with 4 them write result beside we get 41 then multiply it with 4 then write result beside 41 this process repeats

Like? Yes (1) | No   

Harshabh Srivastava   10 years AGO

each term consists multiplication of previous term by 4 and repetition of previous term too.

As 41 = 1*4 i.e. 4 and previous term i.e. 1 ,i.e. 41 ..
16441 = 41*4 i.e. 164 and repetition of 41 ,i.e. 16441 ....
.. So on ..
5th term = 6576416441 * 4 i.e. 26305665764 and previous term repetition i.e. 657641644126305665764 .. (Ans)

Like? Yes (1) | No   

vishwanath   10 years AGO

4*1=4 followed by 1=41
41*4=164 followed by 41=16441
16441*4=65764 followed by 16441=6576416441

Like? Yes (1) | No   

Subbalakshmi   10 years AGO

41*4=164 41
16441*4=65764 16441
65764 16441*4= 26305665764 6576416441

Like? Yes (1) | No   

Chirag Ranjan Lahiri   10 years AGO

263056657646576416441

Like? Yes (1) | No   

12 Dec 2014 Ration and Proportion

A mixture contains juice and water in the ratio 4:3. If 7 litre of water is added to it, the ratio of juice and water becomes 3:4. Find the quantity of juice in the mixture.

OPtion

1) 4 litre
2) 6 litre
3) 8 litre
4) 12 litre
5) 16 litre
6) 18 litre
7) 20 litre
8) 24 litre
9) 28 litre
10)None of these

Solution

Let juice = 4x and water 3x
Then
4x/ 3x+7 = 3/4
16x = 3(3x+7)
x = 3
Juice = 4x = 12 litres.

Option 4)

Correct Option: 4 Best Solution (59)

Vinay Sipani    10 years AGO

Ratio of juice and milk = 4/3
Let there be 4x lts of juice and 3x lts of water.

Now,7l water is added => (3x+7) lts water.

Ratio = 3/4 = 4x/(3x+7)
=> x = 3

Therefore, quantity of juice present = 4x = 12 lts.

Like? Yes (6) | No (1)  

Ashwin Dinesh   10 years AGO

16x = 9x + 21
So x = 3
3*4 = 12 litre
which is option 4)

Like? Yes (4) | No   

Sanu Panji   10 years AGO

1st ratio = 4:3= 12:9
2nd ratio= 3:4= 12:16
(since juice remain same we change the 2nd ratio such that juice become same in both ratio)
7 litre of water is added
so the quantity of juice in the mixture= 12*7/(16-9)
=12 litre

Like? Yes (3) | No   

K.ARun   10 years AGO

4x:3x
4x/(3x+7)=3/4
16x=9x+21
7x=21
x=3
Juice:4x
so 4*3=12

Like? Yes (3) | No (1)  

Udhaya kumar   10 years AGO

By given 4x /(3x+7) = 3y / 4y
x = 3
4x = 12.......

Like? Yes (3) | No (1)  

Rajat Rokade   10 years AGO

Juice 4x, water 3x
after adding water 7 lit
ratio becomes 3:4
we get x=3
juice is 4*3=12 lit.
so option is 4)12 litre

Like? Yes (1) | No   

ASHISH KUMAR MISHRA   10 years AGO

Ratio of juice/water

j/w = 4/3 .....(1)

on adding 7 litre water Ratio is

j/w+7 = 3/4 ....(2)

On solving.......

j = 12 w = 9

Like? Yes (2) | No (1)  

Manasa Kotha   10 years AGO

let the quantity of juice and water be 4xlt and 3xlt so after adding 7 litres 4x/(3x+7)=3/4
on calculating x=3
so quantity of juice =4x=12lt

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

Let the quantity of juice and water is 4x,3x..
In the new solution the quantity of water becomes (3x+7)..
So
4x:(3x+7)=3:4
16x=9x+21
7x=21
x=3
So quantity of juice =4*3=12
Ans 12 litres.

Like? Yes (1) | No   

Arul Shaijan   10 years AGO

Ans 12 litres

Like? Yes (1) | No   

Ranjit Somisetty   10 years AGO

(4x/3x+7)=(3/4)
x=3
juice =4x=12litre

Like? Yes (1) | No   

Sravanthi   10 years AGO

j/w=4/3 ;
j/(w+7)=3/4; on solving
w=9;
so quantity of juice =12

Like? Yes (1) | No   

Saravanan   10 years AGO

4x/3x if 7 Litres is water is added means 4x/(3x+7) so the Ouput is 3/4.

So 4x/(3x+7)=3/4 ==>Cross Multiply==> 16x=9x+21

So x=3.

The juice contains (4*x). So the Answer is 12 Litres

Like? Yes (1) | No   

MRITUNJAY   10 years AGO

4x/3x+7=3/4
x=3
quantity of juice in mixture=4*3=12 litre

Like? Yes (1) | No   

ravi prakash   10 years AGO

12 litre

Like? Yes (1) | No   

sudha chalumuri   10 years AGO

j:w=4:3
j:(w+7)=3:4
solving j and w we get j=12l

Like? Yes (1) | No   

Sandeep Kumar   10 years AGO

By hit and trail method. Ratio between juice and water is 12:9.
After mixing 7 liter of water we have new ratio 12:16 i.e.=3:4. so juice in mixture is 12 litre.

Like? Yes (1) | No   

shaik nawaz   10 years AGO

let ratio be 4x:3x
after adding 7 litres of water,the ratio becomes 3:4
therefore 4x/(3x+7)=3/4
on solving we get x=3
req quantity of juice is 4x3=12

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

LET JUICE BE 4X, THEN WATER = 3X.
AFTER ADDING 7 LTR WATER, QUANTITY = 3X+7
3X+7/4X = 4/3
=> X = 3
4X = 12 LTR. ANS.

Like? Yes (1) | No   

Siddesh H K   10 years AGO

intialy take 4x/3x then 7 litrs of water is aded to mixture then ratio become 4x/(3x+7) then
4x/(3x+7)=3/4 solving the eqn we get 3 and put into above we get 12 litrs Ans

Like? Yes (1) | No   

Ishan Pushkarna   10 years AGO

Let the quantity of juice & Water in the mixture be 4x & 3x respectively.
After adding 7 ltr of water new quantity of water becomes 3x+7 & ratio becomes 3:4
Therefore 4x/3x+7=3/4 which gives x=3 & 4x=12.

Like? Yes (1) | No   

sanjeev kumar   10 years AGO

Ans 12 L

Like? Yes (1) | No   

Siddharth Kaushik   10 years AGO

4x/(3x+7) = 3/4
x = 3
juice = 4x =12 litre

Like? Yes (1) | No   

A M ANKIT KALLURAYA   10 years AGO

write two equations from above cases
J/W=4/3
J/(W+7)=3/4
J=12

Like? Yes (1) | No   

Sambar Naresh   10 years AGO

mixture contains juice and water in the ratio 4:3
so, ratio juice =12 and water =9, 12:9=4:3
then 7 litre of water is added to it so quantity of WATER is 9+7=16
the ration will be 12:16=3:4....quantity of JUICE in the mixture is 12 only....

Like? Yes (1) | No   

Harshabh Srivastava   10 years AGO

If the juice was 12 liter previously, then water must be 9 litre (according to ratio given of 4:3)
Now 7 litre added then it becomes 16 litre which gives a ratio of 3:4 within juice and water.

Like? Yes (1) | No   

Mithun Kumar Kesari   10 years AGO

12 lt

Like? Yes (1) | No   

Ramesh Sriram   10 years AGO

4x/3x+7=3/4
Solve juice=12 litres

Like? Yes (1) | No   

llamar   10 years AGO

4x/(3x+7)=3/4
16x=9x+21
7x=21
x=3
juice =4x=4(3)=12

Like? Yes (1) | No   

Bhagavathi Meena   10 years AGO

12:9

Like? Yes (1) | No   

Nitish Kumar Dubey   10 years AGO

Let the juice be x litre.

4x/3x+7=3/4

x=3 and 4x=12

Like? Yes (1) | No   

Aman   10 years AGO

Earlier juice is 12 ltr and water is 9 ltr.
ratio= 12/9=4/3
After adding 7 litres of water,
juice is 12 ltr and water is16 ltr.
ratio= 12/16=3/4

Like? Yes (1) | No   

Dr.Dipin Singh   10 years AGO

A mixture contains juice and water in the ratio 4:3 i.e. 4x :3x. If 7 litre of water is added to it, the ratio of juice and water becomes 3:4.
so
4x/(3x+7)- 3/4
x=3
Quantity of juice =4x=12 litres

Like? Yes (1) | No   

Pallavi Gupta   10 years AGO

4x/3x+7=3/4
hence, x=3
which gives juice = 12l

Like? Yes (1) | No   

pooja Bakshi   10 years AGO

4x/3x+7=3/4
7x=21
x=3
4*3=12

Like? Yes (1) | No   

Nupur   10 years AGO

Initial composition is 4x: 3x

On adding 7 litres of water it becomes; 4x / 3x +7 = 3/4

x = 3, Hence juice is 4*3 - 12 litres

Like? Yes (1) | No   

Sadhana S   10 years AGO

4x/3x+7=3/4
and hence x=3
quantity of juice in mixture=4*x= 12litre

Like? Yes (1) | No   

supriya avinash   10 years AGO

4:3 => 4x+3x=7x
3:4 =>3y+4y=7y

as juice has same quantity, so, 4x=3y ------(1)

after added 7l water,

3x+7=4y
x=(4y-7)/3 , put into eqn. (1)

y=4

and juice is 12 ans.

Like? Yes (1) | No   

saiteja.ramineni   10 years AGO

j= juice , w= water
(j/w) = (4/3) -------> eq (1)
(j/w+7) = (3/4)--------> eq (2)
=>4 j = 3 w + 21
from eq (1)
w = 3 j/4
substitute w value in eq(2)
4 j = 3( 3 j/4) +21
=> 16 j = 9 j + 84
=> 7 j = 84
=> j = 12
ans 12 litres

Like? Yes (1) | No   

ashutosh anand   10 years AGO

4x/(3x+7)=3/4,x=3,4x=12

Like? Yes (1) | No   

sneha sri   10 years AGO

let x be the amount of juice and y be the amount of water
x:y=4:3
after addition of 7 litres of water
x:(y+7)=3:4
x=12 litres

Like? Yes (1) | No   

Himanshu porwal   10 years AGO

let juice be x litre
and water be y litre
x/y=3/4
and second condition x/y+7=4/3
y from eq. 1 is (4/3)x
put in eq. 2
then y=9
put in 1
then x= 12 litre
option 4 is correct.

Like? Yes (1) | No   

ANUJ SHARMA   10 years AGO

let quanitity of juice = 4x
3/4(3x+7) = 4x......we get x=3
so, quantity of juice : 4x = 12 litres.

Like? Yes (1) | No   

vaitesh mudaliar   10 years AGO

let juice be x and water be y, x/y = 4/3
after adding 7 liters of water x/y+7 = 3/4
solving the above two eqn we get x= 12 liters and y = 9 liters

Like? Yes (1) | No   

Y V S Chandrakanth   10 years AGO

(4x/(3x+7))=3/4
9x+21=16x
x=3
Therfore quantity of juice in the mixture=4*x=4*3=12litres

Like? Yes (1) | No   

Arijit Acharyya   10 years AGO

4 :3 let juice=4x and water=3x
now 4x/(3x+7)=3/4
or, 9x+21=16x
or, 7x=21
or, x=3
the quantity of juice in mixture = 4x = 4*3 = 12 litre

Like? Yes (1) | No   

AYANA JOBY   10 years AGO

x:y=4:3
x:(y+7)=3:4
there fore x=12

Like? Yes (1) | No   

Sai Siddartha   10 years AGO

Taking the concept of Ratios and Proportions, we have two ratios.
1. J/W = 4/3 & . J/(W+7) = 3:4
Solving these two equations, we get unit quantity as 3. So, Juice = 4*3 = 12

Like? Yes (1) | No   

Bhalchandra Barot   10 years AGO

4x/3x+7=3/4
16x=9x=21
x=3
4x=12

Like? Yes (1) | No   

anuj gupta   10 years AGO

12

Like? Yes (1) | No   

Ritu chouhan   10 years AGO

quantity of juice is 4litre

Like? Yes (1) | No   

gowtham   10 years AGO

given :- ratio 4/3=j/w let "x" is ratio preposition
added : 4x/(3x+7)= j/w
next for ratio j/w = 3/4
4x/(3x+7)=3/4
then x= 3
we want the quantity of juice in the mixture
4(3) =j
12 litre..........option (4)

Like? Yes (1) | No   

Rupesh   10 years AGO

4x/(3x+7)=3/4
x=3
4x=12

Like? Yes (1) | No   

Chandra chur anand   10 years AGO

4k/3k+7=3/4
k=3
hence amount of juice is 12lit.. ans..

Like? Yes (1) | No   

niraj   10 years AGO

12:16=3:4

Like? Yes (1) | No   

Surit Datta   10 years AGO

Let 4x be he Juice
3x be the water
after adding 7 liter of water
the ratio become
4x:(3x+7)
which is equal to 3:4
so the x value is 3
so the juice in the mixture is
12 liter
option 4
That's it.

Like? Yes (1) | No (1)  

sneha samanta   10 years AGO

if juice =12l then water was 9l
9+7= 16
16:12=4:3

Like? Yes (2) | No (2)  

Rahul Rathod   10 years AGO

Suppose 4x and 3x water currently.
Now next will be 3x and 4x when 7 litre is added.
so the answer is 12 litre.

Like? Yes (1) | No (1)  

PALASH JAIN   10 years AGO

4th option is correct

Like? Yes (1) | No (1)  

11 Dec 2014 Number of Birds

11 more than one fifth of the total birds flew away from a tree after that one third of the remaining birds came in the tree. If now there are 92 birds in the tree, then total no of birds remained in the tree after first fly away were

OPtion

1) 100
2) 80
3) 69
4) 58
5) 53
6) 50
7) 48
8) 46
9) 31
10)28

Solution

Let total number of birds after first fly away x
according to second condition
x + x/3 = 92
4x/3 = 92
x = 69

Option 3)

Correct Option: 3 Best Solution (18)

K.ARun   10 years AGO

let total no. of birds be x.
So, No. of birds flew=11+x/5.
Tota no. of birds Present now= x-(11+x/5)=> 4x/5-11
After that 1/3(4x/5-11) added back.
So, (4x/5-11)+1/3(4x/5-11)=> 4/3(4x/5 - 11)=92
On solving we get x=100.
So remaining birds after first fly away were= 4x/5-11=69

Like? Yes (8) | No (1)  

Ashwin Dinesh   10 years AGO

x + x/3 = 92
So x = 69
which is option 3)

Like? Yes (3) | No (2)  

Rahul   10 years AGO

suppose initially the number of birds are x
then after the first flew away the remaining will be (4x-55)/5
after the came back (16x-220)/15 which is equal to 92
thus , x=100
and the number of birds after first flew away will be 31
so remainig would be 100-31 = 69 :)

Like? Yes (1) | No   

Manasa Kotha   10 years AGO

11+x/5 birds flew away
11:23 AM
rest will be :@11+x/5)
rest will be X - (11+x/5)
so 4x/5-11 birds will be there
with that 1/3(4x/5 - 11) birds added
so 4/3 (4x/5 - 11)=92
we get x=100
so subst. x=100 we get 69

Like? Yes (1) | No   

Sravanthi   10 years AGO

let us assume total birds=x
92=(4/3)(x-(11+(1/5)x))
x=100
remaining birds after first fly=100-31=69

Like? Yes (2) | No (1)  

Mithun Kumar Kesari   10 years AGO

69

Like? Yes (1) | No   

Srinivas Rao   10 years AGO

Total x
11 more than 1/5 th birds flew 11+1/5x
x-(11+x/5)+1/3(x-11-x/5)=92
solving x=100
Remaining birds remaining is 69 from equation

Like? Yes (1) | No   

BHASKAR MANDAL   10 years AGO

4/3(x-x/5 - 11) = 92
x=100
x-x/5-11 = 80-11 =69
option 3 is the answer

Like? Yes (2) | No (1)  

Anamika Purohit   10 years AGO

let the total number of birds =x
then according to the given condition,equation will be
11+1/5x
then 1/3*4/5x=4/15x
then 4/15x=92
x=345
1/5*345=69

Like? Yes (1) | No   

prudhvi vaddi   10 years AGO

69 birds remained in the tree after first fly away.
Total no.of birds =100
100-100/5-11=(500-100-55)/5= 3455=69 birds

Like? Yes (1) | No   

SHARAN KISHORE   10 years AGO

let the remaining birds be x, then 1/3 of x returned. So, x + x/3 = 92, x = 69

Like? Yes (1) | No   

Rishabh   10 years AGO

lets total number of birds is T.
T-((T/5)+11 number of birds remain in tree after first flew.
lets it suppose a.
now a+ a/3 = 92
after solving equation answer 69.

Like? Yes (2) | No (1)  

Rajat Rokade   10 years AGO

Total birds were 100. Now 31 birds flew away. So total remaining birds will be 100-31=69.
So, option 3 is correct.

Like? Yes (1) | No (1)  

Pramod Gaikwad   10 years AGO

Total birds =100,
31 birds are fly away,
remaining birds is 69.
so option is 3)69.

Like? Yes (1) | No (1)  

murari kumar   10 years AGO

Let total no of birds =x
no of birds after first fly= x-((x÷5)+11)
no of birds came after first fly= 1/3 (x-x÷5-11)
therefore ;
(x-x/5-11)+1/3(x-x/5-11)=92
after solving above eqation we get
x=100
hence no of birds after first fly = 69

Like? Yes (1) | No (1)  

Arul Shaijan   10 years AGO

Ans:69

Like? Yes (1) | No (1)  

Anjali   10 years AGO

let the no of birds be x
birds flew away = 11+ (1/5)x = (55+x)/5
birds left on tree = x - (55+x)/5 -------------------(1)
birds on tree after some birds came in =
(1/3)( (4x-55)/5) + (4x-55)/5 = 92
it gives x=100
put x=100 in eq-1 we will get
birds left on tree = 69

Like? Yes (1) | No (1)  

Rahul Rathod   10 years AGO

Let us consider total no of birds=100
no of birds flew away=11+(1/5)*x=31
no of birds came =(1/3) of remaining(69)=23
so
no of birds on tree = 23+69=92
so 100-31=69
answer is option 3)69

Like? Yes (1) | No (2)  

10 Dec 2014 4 digit number problem

The product of all digits of a 4 digit number is 630. How many such numbers can be made. all the digits of the given number are different

OPtion

1). 12
2). 20
3). 24
4). 26
5). 36
6). 48
7). 64
8). 100
9). 112
10). 120

Solution

Product = 630
= 2*3*3*5*7
Only 2 prossibility is there
2 x 9 x 5 x 7
Or
3 x 6 x 5 x 7

2, 9, 5, 7 can be arranged in 4 x 3 x 2 x 1 = 24 ways similarly other
So answer will be 48.

Correct Option: 6 Best Solution (20)

RAKESH   10 years AGO

630 = 2*5*7*9 = 3*5*6*7

4! + 4! = 48

Like? Yes (9) | No (3)  

Rajat Rokade   10 years AGO

630=2*3*3*5*7
Now,
four digit number are to be formed out of these numbers.
only two numbers 7529 and 7563 are possible.
So, possible combinations = 4! + 4!
=48. So option 6) is correct.

Like? Yes (3) | No (1)  

HARMEET KAUR   10 years AGO

Possible set of digits are 2,5,7,9 & 3,5,6,7 .
so possible numbers = 2 x (4*3*2*1) =48

Like? Yes (3) | No (1)  

Pramod Gaikwad   10 years AGO

only two numbers 7529 and 7563 are possible.
So, possible combinations = 4! + 4!
=48.
So option 6)

Like? Yes (2) | No (1)  

SAYAN CHATTERJEE   10 years AGO

the factors of 630 are 2,5,3,3,7
they can be togetherly taken in four digits as the permutations of (9527) and (6537). so the no. of such numbers will de (4!+4!= 48) (6)

Like? Yes (1) | No   

P.Nikhil Reddy   10 years AGO

Take LCM 0f 630....you get factors as ,7,3,3,2,5....now no number can be clubbed with 7 & 5..as they become 2 digits..

hence digits can be 7,5,2,9(3*3), or 7,5,3,6(2*3).....therefore these 4 digits can be arranged in 4! ways ...

hence 7,5,2,9 (24) ..7,5,3,6(24)...

total 48

Like? Yes (2) | No (1)  

K.ARun   10 years AGO

2,5,7,9 and 6,5,7,3 are the only 4digit no. which leads to the product of 630.
2,5,7,9 by permutation we will get 24combinations and 6,5,7,3 by permutation we will get 24combinations These are the possible combinations for 4digit nos.
with these we can make 48possible combinations

Like? Yes (4) | No (3)  

kumari jyoti   10 years AGO

there are two sets of digits possible. 7,5,3,6 and 7,5,9,2.
now for the arrangement of 4 digits for a number without repetition is 4! i.e. 24 and there are two sets of numbers. so, the answer is 48.

Like? Yes (2) | No (1)  

Sravanthi   10 years AGO

6 5 3 7 (24 combinations)
9 2 5 7
total 2 sets of 24=48

Like? Yes (2) | No (1)  

murari kumar   10 years AGO

630=2*3*3*5*7
630=2*9*5*7 and 3*6*5*7
using above digits four digit no can be formed = 24+24=48

Like? Yes (2) | No (1)  

sanjeev kumar   10 years AGO

Ans 48

Like? Yes (1) | No   

BHASKAR MANDAL   10 years AGO

possibilities 2,5,7,9 and 3,6,5,7
so 2*4! =48
option 6

Like? Yes (1) | No   

Revathi   10 years AGO

factors of 630 = 2*3*3*5*7
since it is a 4 digit number the factors can be arranged as 2*5*7*9 and 3*5*6*7
2579 = 24 combinations
3567 = 24 combinations
total 48.

Like? Yes (1) | No   

Mithun Kumar Kesari   10 years AGO

630=8*7*2*5

case1: digits= 2,5,7,9
possible numbers= 4!= 24
case 2: digits= 3,5,6,7
possible numbers= 4!= 24


so total no. =48

Like? Yes (1) | No   

Rajeev Kumar Garikapati   10 years AGO

7,3,3,5,2 are the factors of 630...
So, the four digits are 7952 and 7365
both have 4! + 4! = 48.

Like? Yes (1) | No   

Chandra chur anand   10 years AGO

factor of 630=2*5*3*3*7
so 4 digit no. ll be 2597 so arrangment from these 4 no. ll be 24
and another no. is 6537 so again arrangement ll be 24
hence total n. ll be 48 ans.... confirmed!!!

Like? Yes (1) | No   

Anjali   10 years AGO

two combinations possible:
(2,9,5,7) - 4! ways
(6,3,5,7) - 4! ways
total = 48 ways

Like? Yes (1) | No   

Vinay Sipani    10 years AGO

630 = 2 * 3 * 3 * 5 * 7

As all the digits are different,possible combinations are
6*5*3*7 , 2*9*5*7

Digits of 6537 can be arranged in 4! = 241 ways
Digits of 2957 can be arranged in 4! = 24 ways

=> 48 numbers are possible.

Like? Yes (1) | No (1)  

Dr.Dipin Singh   10 years AGO

Possible set of digits are 3,5,6,7 and 2,5,7,9.
so number of such numbers = 2*(4*3*2*1)=48

Like? Yes (2) | No (2)  

Manasa Kotha   10 years AGO

7635=4*3*2*1=24
7295=4*3*2*1=24
so total 48

Like? Yes (1) | No (1)  

09 Dec 2014 Volume and surface areas

2.2 cubic dm. of lead is to be drawn into a cylindrical wire 0.50 cm in diameter. The length of the wire is

OPtion

1) 110 m
2) 124 m
3) 108 m
4) 98 m
5) 224 m
6) 136 m
7) 220 m
8) 112 m
9) 148 m
10)None of these

Solution

Volume of wire = (2.2*10*10*10) cm^3 = 2200 cm^3.
22/7 * 0.25 * 0.25 * h = 2200
h = (2200 * 7/22 * 1/ 0.25*0.25) cm
Therefore
Length of wire = (11200/100) m = 112 m

Option 8)

Correct Option: 8 Best Solution (37)

Revathi   10 years AGO

vol = pi*r*r*h
diameter=0.50cm
radius=0.50/2cm=0.25/100m
vol=2.2dm=2.2/1000m
2.2/1000=(22/7)((0.25/100)^2)*h
h=(2.2/1000)(7/22)(100^2/0.25^2)
h=7/0.0625
h=112m

Like? Yes (11) | No (4)  

bhagya   10 years AGO

Let the length of the wire be h metres. Then,

? (0.50/(2 x 100))2 x h = 2.2/1000

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (7) | No (1)  

Rishabh   10 years AGO

(22/7)*(r)^2*h = volume of cube
h = (2.2/1000)*(7/22)/(.5/2)^2

Like? Yes (9) | No (3)  

Pramod Gaikwad   10 years AGO

Let the length of the wire be h metres. Then,
pi* (0.50/(2 x 100))2 x h = 2.2/1000
h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (7) | No (3)  

prudhvi vaddi   10 years AGO

LENGTH OF THE WIRE=X MTS
W. K.T V=(PIE* R^2* H)
H=V/(PIE*R^2)
GIVEN V=2.2CUBI DM=2.2/1000 DM
(0.50/(2 x 100))2 x X = 2.2/1000DM
X= ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112MTS

Like? Yes (4) | No   

Anand Dwivedi   10 years AGO

Let Length of Wrire= h Meter then

(0.50/(2*100)^2 * h= 2.2/1000

Than [2.2/1000]*[100*100]/[0.25*0.25]*[7/22]

==112 meter after solving all value

So answer will be 112 meter

Like? Yes (4) | No (2)  

Ashwin Dinesh   10 years AGO

l = 2200/(pi*0.25*0.25) = 11204 cm = 112 m
option 8)

Like? Yes (3) | No (1)  

RAKESH   10 years AGO

2.2 = pi*r^2* h gives value of h

Like? Yes (3) | No (1)  

K.ARun   10 years AGO

V=pi r^2 * h
2.2/1000 = 22/7 * (0.50/(2*100))^2 *h
on solving we get h=112m

Like? Yes (7) | No (6)  

Sravanthi   10 years AGO

pi(r^2)h=volume
22/7 * .25*.25 * h = 2200
h= 2200 * 7 / (22*.25*.25) = 11200 cm =112m

Like? Yes (4) | No (3)  

ravi prakash   10 years AGO

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (3) | No (2)  

Himanshu porwal   10 years AGO

volume of cyl. =(3,14).r^2h
vol. of lead = 2.2 cubic dm=2200cm^3
(3.14).r^2.h=2200
r=0.25cm
h=112m(approx.)
so option. 8 is correct

Like? Yes (4) | No (3)  

Manasa Kotha   10 years AGO

v=pir2h
2.2/1000 = 22/7 * (0.50/(2*100))^2 *h
on solving 112

Like? Yes (3) | No (2)  

CHANDA VIJAYALAKSHMI   10 years AGO

Let the length of the wire be h metres. Then,

? (0.50/(2 x 100))2 x h = 2.2/1000

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (2) | No (1)  

Taresh   10 years AGO

2.2 dm^3 =2200cm^3
volume of metal doesn't change with shape
hence
volume of cylinder = pi r^2 h
h= V/pi r^2
= 2200/0.25*3.14
= 11204.51cm
~112m

Like? Yes (4) | No (3)  

Shreya Banerjee   10 years AGO

Answer :
Option c

Explanation :


Let the length of the wire be h metres. Then,

? (0.50/(2 x 100))2 x h = 2.2/1000

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) =

112 m.

Like? Yes (3) | No (2)  

Sabita Mohanty   10 years AGO

convert the quantities into m
and apply cylinders volume formula

Like? Yes (4) | No (3)  

Chirag Ranjan Lahiri   10 years AGO

Let the length of the wire be h metres.
Then,
(0.50/(2 x 100))2 x h = 2.2/1000
h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (3) | No (2)  

shilpareddy   10 years AGO

applying the formula of volume of cylinder pi*r*r*l=volum
frm that we can find the length of wire as 112m

Like? Yes (1) | No   

Udhaya kumar   10 years AGO

V = pi / 4 * d^2 * l
2.2*10^-3 = pi / 4 * (0.5 *10 ^-2)^2 * l
l =112.045 = = = 112 m..............

Like? Yes (2) | No (1)  

AJAI AGARWAL   10 years AGO

0.22=PI*0.0025*x

Like? Yes (2) | No (1)  

lakshmi   10 years AGO

Let the length of the wire be h metres. Then,
∏ (0.50/(2 x 100))2 x h = 2.2/1000
 h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (2) | No (2)  

Anand   10 years AGO

(0.50/(2 x 100))2 x h = 2.2/1000

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (3) | No (3)  

jayalakshmi   10 years AGO

Let the length of the wire be h metres. Then,
∏ (0.50/(2 x 100))2 x h = 2.2/1000
 h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (2) | No (2)  

BHASKAR MANDAL   10 years AGO

option 8

Like? Yes (2) | No (2)  

kumari jyoti   10 years AGO

volume of lead given=2.2dm^3.
now calculating the volume of the wire and equating it to the given volume;
(22/7)*r^2*l=2.2 dm^3
now r=d/2, d is given to be 0.5 cm. so,evaluating it we get l=112m i.e. option 8.

Like? Yes (2) | No (2)  

Mithun Kumar Kesari   10 years AGO

112 m

Like? Yes (2) | No (2)  

Surit Datta   10 years AGO

Let the length of the wire be h meters.
Then,
(0.50/(2 x 100))2 x h = 2.2/1000
h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (2) | No (2)  

PAWAN KUMAR   10 years AGO

Volume of lead = 2.2 dm^3 = 2.2*1000 cm^3 = 2200 cm^3
Radius of cylindrical wire = 0.5/2 cm = 0.25 cm
Let length of wire be h cm.
volume of cylinder = volume of lead
=> pi*r*r*h = 2200
=> 22/7*0.25*0.25*h = 2200
=> h = 7*4*4*100 = 112*100 cm = 112 m. Ans.

Like? Yes (2) | No (2)  

Rupesh   10 years AGO

π*0.25/100*0.25/100 *x=2.2/1000
x=112 m ans..

Like? Yes (1) | No (1)  

jagan   10 years AGO

volume of cylinder=2.2 cubic dm=2.2×1000 cubic cmΠr^2h=2200r=0.5/2= 0.25cmh=11210.19 cm=112.10 metre
Ans: Length of wire is 112.10 metre

Like? Yes (1) | No (1)  

Rahul Rathod   10 years AGO

Let the length of the wire be h meters.
pi* (0.50/(2 x 100))2 x h = 2.2/1000
h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) )
=112 m.
so ans is 112 m option 8)

Like? Yes (3) | No (4)  

Rajat Rokade   10 years AGO

Let the le3ngth of the wire be x metres.
so, pi*((0.50)/(2*100)) *x = 2.2/1000
x= ((2.2/1000)*(100*100)/(0.25*0.25)*(7/22))
so x=112m

Like? Yes (3) | No (4)  

Sundar Kumar   10 years AGO

Let the length of the wire be h metres. Then,
∏ (0.50/(2 x 100))^2 x h = 2.2/1000
h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m
Answer: Option: 8) 112m

Like? Yes (3) | No (4)  

Praneet   10 years AGO

vol. of cube=vol. of wire
so
lenght of wire =vol. of cube divided by pi*(.50/2)2

Like? Yes (2) | No (3)  

Meera R   10 years AGO

1 cubic dm=0.001 cubic m
1cm=.001m
pi*r*r*l=volume=volume of lead=2.2cubic dm=0.0022cubic m
so l=(0.0022*10000)/(0.25*0.25*pi)
ie l=112.10m

Like? Yes (1) | No (2)  

purushothama   10 years AGO

Let the length of the wire be h metres. Then,

? (0.50/(2 x 100))2 x h = 2.2/1000

h = ( (2.2/1000) x (100 x 100)/(0.25 x 0.25) x (7/22) ) = 112 m.

Like? Yes (1) | No (3)  

08 Dec 2014 Sequence

What is the next number of the following sequence
36, 48, 510, 633, 756, 879, ...

OPtion

1) 11910
2) 9812
3) 9712
4) 9912
5) 1099
6) 91010
7) 9119
8) 8711
9) 9911
10)None of these

Solution

36
36 = (3+1) (6+2) = 4 8 -> 48
48 = (4+1) (8+2) = 5 10 -> 510
510 = (5+1) (1+2) (0+3) = 6 3 3 -> 633
633 = (6+1) (3+2) (3+3) = 7 5 6 -> 756
756 = (7+1) (5+2) (6+3) = 8 7 9 -> 879
Similarly
879 = (8+1) (7+2) (9+3) = 9 9 12 -> 9912
Option 4)

Correct Option: 4 Best Solution (38)

Yekollu Muneeswar   10 years AGO

It is in the form, xyz->(x+1)(y+2)(z+3)
36 -> (3+1)(6+2)=48
48->(4+1)(8+2)=510
510->(5+1)(1+2)(0+3)=633
633->(6+1)(3+2)(3+3)=756
756->(7+1)(5+2)(6+3)=879
879->(8+1)(7+2)(9+3)=9912

option 4) 9912

Like? Yes (12) | No (2)  

Saranjit Singh   10 years AGO

36.. add 1 to 3 and 2 to 6 to get 48 .
48 .... add 1 to 4 and 2 to 8 to get 510.
510..... add 1 to 5 and 2 to 1 and 3 to 0 to get 633.

similarly
879... 8+1 7+2 9+3 will give 9912.

Like? Yes (3) | No   

Manasa Kotha   10 years AGO

first digits are in sequence so next number first digit is 9
2nd digits has difference of 2 so 2nd digit is 9
and third digits are multiples of 3 so 12
finally 9912

Like? Yes (2) | No (1)  

SAM   10 years AGO

8+1=9 |
7+2=9 | = 9912
9+3=12 |

Like? Yes (1) | No   

K.ARun   10 years AGO

879--->9912
1st digit i.e. 8(+1)-----> 9
2nd digit i.e.7(+2)----->9
3rd digit i.e. 9(+3)----->12

logic is
1st digit----> +1(increment)
2nd digit ----> +2 (increment)
3rd digit ----> +3 (increment)

Like? Yes (3) | No (2)  

prem   10 years AGO

op 4>
633-510=123
756-633=123
879-756=123
means at first digit difference is 1
at 2nd digit diff is 2 and at third digit diff is 3
hence next no is 9912
hence op is 4

Like? Yes (1) | No   

Ritu chouhan   10 years AGO

9912 is ans

Like? Yes (1) | No   

Arul Shaijan   10 years AGO

36-->48
3+1=4, 6+2=8 so, 48

ll'ly 510-->633
5+1=6, 1+2=3 0+3=3 so,633

879,
8+1=9, 7+2=9, 9+3=12 so, 9912

Like? Yes (2) | No (1)  

MOHAMMED MOIZ ALI KHAN   10 years AGO

First digit is a sequence of 2,3,4,5,6,7,8 so the first number should be 9
From last 3 numbers the sequence of odd numbers 3,5,7 leaves the 2nd number as 9
36,48,510 shows the last digit as multiple of 2 and in the next 3 numbers 633,756,879 last digits are multiple of 3 and so the last number is 12

Like? Yes (1) | No   

Azhar Syed   10 years AGO

Next number's logic is 1st digit+1, 2nd digit+2, 3rd digit+3........
so answer is 9912 I.e option 4.
next to this will be 101146

Like? Yes (1) | No   

lovely verma   10 years AGO

3+1=[4] and 6+2=[8] =============48
4+1=[5] and 8+2=[10]=============510
5+1=[6] and 1+2=[3]and 0+3=[3]====633
6+1=[7] and 3+2=[5]and 3+3=[6]====756
7+1=[8] and 5+2=[7] and 6+3=[9]===879
8+1=[9] and 7+2=[9] and 9+3=[12]==9912
so the next no. is 9912 ans.

Like? Yes (2) | No (1)  

A M ANKIT KALLURAYA   10 years AGO

unit digit=3,6,9,12
tens and hundred digit=add 12 each time

Like? Yes (1) | No   

APPIKONDA SANTOSH NAIDU   10 years AGO

9912

Like? Yes (1) | No   

abhishek   10 years AGO

87+12=99
9+3=12
9912

Like? Yes (1) | No   

abhishek   10 years AGO

there is a pattern of increment of each digit at its respective places.

Like? Yes (1) | No   

yazhini   10 years AGO

the numbers are in sequence...
first number:add 1.eg:1,2,3..
seond number:sequence of odd.eg:1,3,5,7
third number:multiples of 3.eg:3,6,9,12..

Like? Yes (1) | No   

Farid Ahmad   10 years AGO

30+3*2=36
40+4*2=48
500+5*2=510
600+(6*2)=600+(12)=600+(1+2)=600+(33+0)=633
700+(7*2)=700+(14)=700+(1+4)=700+(55+1)=756
800+(8*2)=800+(16)=800+(1+6)=800+(77+2)=879
900+(9*2)=900+(18)=900+(1+8)=900+(9(9+3))=900+(912)=9912

hence option (4) is correct

Like? Yes (1) | No   

Shiv Kumar   10 years AGO

First Digit is getting increased 1, 2nd digit is getting increased by 2 and 3rd getting increased by3. So next number would be 9912

Like? Yes (1) | No   

Sravanthi   10 years AGO

9912

Like? Yes (1) | No   

shishira   10 years AGO

in the sequence the first digit is 3,4,5,6,7,8 so the next will b 9 and for the second digit are odd num so nxt odd num will b 9 so option 4

Like? Yes (1) | No   

Yash   10 years AGO

The first digit increase by +1...

Second digit by +2..

Third by +3...

First digit=9
Second =9
Third =12

Like? Yes (1) | No   

shivendra pratap singh   10 years AGO

add 1 in 1st digit then 2 in second digit and 3 in 3rd digit.

Like? Yes (1) | No   

SAI DINESH   10 years AGO

answer is 9912
add 1 in 1st digit then 2 in second digit and 3 in 3rd digit to the previous number
3+1 6+2 = 4 8
4+1 8+2 = 5 10
.
.
.
.
8+1 7+2 9+3 = 9 9 12

Like? Yes (1) | No   

koya ravi   10 years AGO

number series 3,4,5.....9
next 3,5,7,9
next 3,6,9,12

Like? Yes (1) | No   

vikram kumar   10 years AGO

36,48,510,633,756,879

1st digit 3,4 ,5,6....
second digit incrementing by +2=6,8,10,3
3 rd digit by 3= 0,3,6,9,12

Like? Yes (1) | No   

Jitender   10 years AGO

starting from the third number of the sequence
every hundredth digit of a number is increasing by 1
every tenth digit of a number is increasing by 2
every unit digit of a number is increasing by 3

Like? Yes (1) | No   

Kowsalya   10 years AGO

9912
first digit :9 (first digit series 3,4,5,6,7,8,9)
second digit 9 (6,8,10 - even series, 3,5,7,9 -odd series)
last digit 12 (633,756,879 last digits are multiples of 3)

Like? Yes (1) | No   

Yogesh Sharma   10 years AGO

as first digit is increasing by 1 and second by 2 so 3 by 3

Like? Yes (1) | No   

Revathi   10 years AGO

first digit is in a series (+1) so first digit is 9
second digit for the first 3 numbers even number series and last three numbers odd number series so the second digit is 9
third digit in the last three numbers multiples of 3 so last 2 digits 12.
Hence the answer is 9912

Like? Yes (1) | No   

Rajat Rokade   10 years AGO

510,633,756,879
here,
1st digit increases by 1
2nd digit increases by 2
3rd digit increases by 3
so,
8+1=9
7+2=9
9+3=12

So the answer is 9912. i.e. option 4)

Like? Yes (2) | No (2)  

Pramod Gaikwad   10 years AGO

first digit increases by 1,second by 2 and third by 3

Like? Yes (2) | No (2)  

ravi prakash   10 years AGO

8+1=9
7+2=9
9+3=12

Like? Yes (1) | No (1)  

sravani   10 years AGO

3 6
4 8
5 1 0
6 3 3
7 5 6
8 7 9

9 9 12

Like? Yes (1) | No (1)  

PAWAN KUMAR   10 years AGO

here, the first digit of each no is in a series i.e., 3,4,5,6,7,8.
so, next digit will be 9.
Also, the next digit of each number from 3-digit no onwards is 1,3,5,7.
So, next no second digit would be 9.
Also, the last digit = 3, 6, 9.
So, next no last digit = 12.

Like? Yes (1) | No (1)  

llamar   10 years AGO

36,48,510,633,756,879,
first digit 3,4,5,6,7,8,9
second digit 6,8,1(10),3,5,7,9
third digit 0,3,6,9,12
ans:9912

Like? Yes (1) | No (1)  

Ashwin Dinesh   10 years AGO

x ( SumOfDigitsOf(x*2) ) ( SumOfDigitsOf(x*2) + i )
where i = i + 1;
9 ( 9*2 = 18 => 9 ) (9 + 3 = 12)
9912
which is option 4)

Like? Yes (2) | No (2)  

prudhvi vaddi   10 years AGO

36, 48, 510, 633, 756, 879, ?
1)COMMON THINGS IS 3, 4, 5, 6, 7, 8 , NEXT ELEMET IS "9" (ADD 1)
2)6. 8. . (ADD 2)
6+2=8, 8+2=10
3)33,56,79
TAKE MIDDLE NUMBERS = 3,5,7,..(ADD 2)
ANSWER 3,5,7,"9"
4) TAKE LAST NUMBERES =3, 6, 9,.. (ADD 3)
ANSWER 3,6,9, "12"
SO ANWER IS 9912

Like? Yes (1) | No (1)  

Rahul Rathod   10 years AGO

3,6
4,8
5,10
6,3,3
7,5,6
8,7,9
first digit increases by 1
second by 2 and third digit y 3
so
answer is 9,9,12
9912

Like? Yes (2) | No (4)  

05 Dec 2014 Simple Interest

In what time will a sum of money double itself at 25/4 % p.a. simple interest?

OPtion

1) 5 years
2) 3 years
3) 8 years
4) 12 years
5) 10 years
6) 9 years
7) 16 years
8) 18 years
9) 20 years
10)None of these

Solution

Suppose, sum = x. Then S.I. = x & Rate = 25/4 %
Therefore time = (100*x)/(x* 25/4) = 16 years

Option 7)

Correct Option: 7 Best Solution (70)

Arul Shaijan   10 years AGO

1 year=25/4 %
so to attain 100%

(25/4)x=100
x=(100/25)*4
x=16

Like? Yes (39) | No (16)  

Sravanthi   10 years AGO

Principal = P, Amount = 2P
Simple interest = A - P = 2P – P = P
Ttme = (100 × S.I)/(P × R) = ( 100 × P)/(P × (25/4)) = 100/(25/4)=16years

Like? Yes (30) | No (9)  

Chirag Ranjan Lahiri   10 years AGO

Sum = x
then amount = 2x
so simple interest = 2x - x = x

now, T = (SI * 100)/(P * R)
T = (x * 100)/(x * 25/4) = 16 years..........

Like? Yes (30) | No (16)  

shraddha porwal   10 years AGO

let the sum=100
after t years it becomes 200,
therefore SI=200-100=100
now
SI=(P*R*T)/100
100=(100*(25/4)*t)/100
t=16 years

Like? Yes (18) | No (8)  

Ramesh Sriram   10 years AGO

I=ptr/100
sum of amount doubles hence
p=ptr/100
100=tr
100=25/4*t
t=16 years

Like? Yes (12) | No (5)  

arun   10 years AGO

we know that
SI = PTR/100
given
SI = P
R = 25/4
so P = (P*T*25)/400
400 = T*25
T = 400/25
T = 16 years

Like? Yes (10) | No (4)  

VENKATESAN A   10 years AGO

S . I = PRT/100
T= ( P * 100 * 4 ) / (P * 25 )
= 16 Years

Like? Yes (11) | No (7)  

Farid Ahmad   10 years AGO

Let sum be=x
it becomes double so that S.I=x
Rate=25/4 p.a
let it would be double after T years,then
Time=S.I*100/P*R
Time=x*100/x*25/4
Time=100*4/25
Time=16 years

Hence option 7 is correct

Like? Yes (7) | No (3)  

Azhar Syed   10 years AGO

x=x*N*6.25/100 ==> N=16

Like? Yes (5) | No (2)  

MAHARAJAN.G   10 years AGO

t = (1/r)(A/P - 1)
A = Total Accrued Amount (principal + interest)
P = Principal Amount
I = Interest Amount
r = Rate of Interest per year in decimal; r = R/100
t = Time Period involved in months or years
let consider p=1000
by the sum money doubled a=2000
r in decimal=25/4* 1/100=1/16
t=(1/1/16) (2000/1000-1)
t=16*(2-1)
t=16
ans) option 7

Like? Yes (6) | No (3)  

khushboo goenka   10 years AGO

x=x*25*t/4*100
so t=16 year

Like? Yes (3) | No   

gangulasiva   10 years AGO

interest and principal are same for money double
so for 6.25%,100/6.25=16 years

Like? Yes (3) | No (1)  

ramakrishnateja   10 years AGO

given the rate of interest is 25/4%, amount is 2p.
where p is the sum of money. we know that the p+s.i=amount.
P+(p*t*25/4)/100=2p. then t=16 years.

Like? Yes (3) | No (1)  

BHASKAR MANDAL   10 years AGO

100/(25/4)= 16 yrs

Like? Yes (3) | No (1)  

Chandra chur anand   10 years AGO

t=(2-1)*100*4/25
t=16 yr. ans

Like? Yes (4) | No (2)  

Devendra Marghade   10 years AGO

Money doubles when,interest=Sum of the money invested
If sum of money=x & time=t then
x*t*(25/4)*100= x
t=16

Like? Yes (3) | No (2)  

Sanu Panji   10 years AGO

100*4/25= 16 yrs

Like? Yes (5) | No (4)  

K.ARun   10 years AGO

In this case
I=ptr/100
I=P,r=25/4
on solving
t=16

Like? Yes (7) | No (6)  

sai   10 years AGO

a=P(1+t/16) if t=16 then a=2P

Like? Yes (3) | No (2)  

anu   10 years AGO

p+ptr/100=2p

Like? Yes (3) | No (2)  

niraj   10 years AGO

400/25=16

Like? Yes (2) | No (1)  

harika   10 years AGO

s.i=ptr/100 so,here given rate=25/4%p.a and let us p=s.i=p then 25/4=100*p/p*T=>T16

Like? Yes (2) | No (2)  

Gona Sadhana   10 years AGO

Given 25/4=6.25
as 6.25% it is 6.25/100=0.0625
Hence it needs to reach 100%, 100/100=1
Finally 0.0625x=1
x=1/0.0625
x=16yrs

Like? Yes (2) | No (2)  

nikhil birage   10 years AGO

at 6.25% for suppose take amount 100,,if we calculate then will get doubled amount after 16 years..

Like? Yes (2) | No (2)  

Md.Sultan Khichi   10 years AGO

Let x is the principle..
Amnts=2x
SI=2x-x=x
SI=prt/100
x=(x*25*t)/(100*4)
t=16
Ans. Ob. 7

Like? Yes (2) | No (3)  

CHANDAN KUMAR   10 years AGO

si=prt/100
si=p
p=prt/100
100=rt
100=25t/4
t=400/25=16 years

Like? Yes (1) | No (2)  

Yekollu Muneeswar   10 years AGO

simple interest formula SI=PTR/100
given that amount doubles means SI=P
P=PTR/100
100P=PT(25/4)
100*4=25T
T=16
so 7) 16 years

Like? Yes (2) | No (3)  

Anand   10 years AGO

Let Principal = P, then, Amount = 2P
So , S.I. = A - P = 2P – P = P
T = (100 × S.I)/(P × R) = ( 100 × P)/(P × 25/4) = 25/2 = 16 years

Like? Yes (3) | No (4)  

sunil bajpai   10 years AGO

p=p*25/4*100*t
t=16

Like? Yes (2) | No (3)  

ravi prakash   10 years AGO

p=s.i
t=100*si/p*r
=100*4/25
=16 years

Like? Yes (2) | No (3)  

sravani   10 years AGO

let the amouunt be X.
double will be 2X.
2X=X+(X*T*25/4 ) /100
T * 25/4 = 100
T=16 Years....

Like? Yes (1) | No (2)  

sreenivasa reddy   10 years AGO

let P=1000
then I=P*t*r/100
if p=double then P+i=2000->i=1000
so 1000={1000*t*(25/4)}/100 ->answer=16

Like? Yes (1) | No (2)  

vijay kumar singh   10 years AGO

let p=x,I=2x-x=x
time=x*100/x*25/4=16

Like? Yes (1) | No (2)  

Rahul Rathod   10 years AGO

1year= 25/4
4 year=25%
so answer =16
option is 7)16

Like? Yes (10) | No (11)  

priyanka    10 years AGO

16 years baese of answer

Like? Yes (2) | No (3)  

Ashwin Dinesh   10 years AGO

I = (pnr)/100 ...(1)
Amount will be double when I = p ...(2)
r = 25/4 ...given ...(3)
Putting (2) and (3) in (1) we get n = 16
Which is option 7)

Like? Yes (3) | No (4)  

chanukya reddy   10 years AGO

PTR/100
(1000*T*25/4)/100=1000
T=16YEARS

Like? Yes (2) | No (3)  

PAWAN KUMAR   10 years AGO

To double the investment, the interest should equal to principle in that much year.
Let principle be Rs x and time be t years.
Then,
x*25*t/100*4 = x => t = 100*4/25 = 16 years.

Like? Yes (2) | No (3)  

Ritu chouhan   10 years AGO

time=(100*(2-1)*4)/25
=16years

Like? Yes (1) | No (2)  

Ramesh sai   10 years AGO

25/4=6.25% interest PA
Let us consider sum to be 100/-
6.25-------->1st year
12.50------->2nd year
---
----
200------>16th year(Sum doubled)

Like? Yes (1) | No (2)  

sanjeev kumar   10 years AGO

ans 16 year

Like? Yes (2) | No (3)  

Sivaraj   10 years AGO

since its a simpleinterest just divide 100 by 25/4 will give the years in which it gets double. so its 16

Like? Yes (1) | No (2)  

Ajay Kumar Gupta   10 years AGO

2P=P+(P*t*25/4)/100
=> t=16 yrs
P=principle
t=time in yrs

Like? Yes (1) | No (2)  

Anjali   10 years AGO

let the principle, P=x
R=25/4 %
time in years, T=t
Now, ( (x * 25 * t)/(4 * 100) )+ x = 2*x
solving it we get, t=16 years

Like? Yes (1) | No (2)  

ganesh babu   10 years AGO

P(AMOUNT)=X
S.I=X
S.I=PNR/100
X=XN25/400
N=400/25
N=16

Like? Yes (2) | No (4)  

Satya narayan sen   10 years AGO

si = (x*25/4*16)/100 = x

A = x + x = 2x

Like? Yes (1) | No (3)  

ASHWANI SINGH   10 years AGO

Here, I=P
By I=PRT/100
1=RT/100
T=100/R
T=100/(25/4)
T=16 years

Like? Yes (1) | No (3)  

C sharma   10 years AGO

S.I = P*R*T/100;

Like? Yes (1) | No (3)  

mohit saxena   10 years AGO

for double the some of money
SI = P (sum of money).................(1)

since SI = (P*R*T)/100
P = (P*R*T)/100 FROM (1)
R*T = 100
T = 100/R
= 100/(25/4)
= 16 YEARS

Like? Yes (1) | No (3)  

Arijit Acharyya   10 years AGO

money will be double when ST=P
SI=p*r*t/100
p=(p*25/4*t)/100
t=400/25 = 16 years

Like? Yes (1) | No (3)  

Praveen singh   10 years AGO

let x be the interest on rs x
so x=(x*25/4*t)/100
so t=16 trs

Like? Yes (1) | No (3)  

Raman   10 years AGO

if x is principal and t is the time, then
x= x*(25/4)*t/100
t=16

Like? Yes (2) | No (4)  

NATISH KUMAR   10 years AGO

let Principal be 100
and SI be 100 so that Sum should be Eqal to 200(Double)

100=100*25/4*x/100 = 16 Years

Like? Yes (1) | No (3)  

K.NagaSugunaManasa   10 years AGO

Assume original amount=x
Total amount 2x=x+simpleinterest
so simple interest=x
Timeperiod=T
RateofInterest R=25/4
SimpleInterest=PTR/100;
x=(x*T*25/4)/100;
solve then T=16yeras
so option is 7

Like? Yes (1) | No (3)  

satyaprakash   10 years AGO

interest=(p*n*r)/100
the sum should be double i.e. interest should be equal to p.
therefore (p*n*r)/100=p
therefore n=100/r=100*4/25
n=16.....

Like? Yes (1) | No (3)  

tirupathi reddy   10 years AGO

S.I= PTR/100
If Simple Interest(S.I) = Princple amount(P)
P=PTR/100
TR=100
T=100/R (R=25/4%)
T=100*4/25
T=16 years

Like? Yes (1) | No (3)  

rahul kumar   10 years AGO

T= (n-1)*100/R

T=((2-1)*100)/(25/4) =16

Like? Yes (1) | No (3)  

Swagatam Kumar Das   10 years AGO

According to question let the amount is x
So 2x=x(1+RT/100) where R is 25/4
Sp x is= (4*100)/25 =16

Like? Yes (1) | No (3)  

Neha Wdhwa   10 years AGO

S.I=P*R*T/100

Like? Yes (1) | No (3)  

jagan   10 years AGO

here we want principle is will be double in certain period of time so intrest i=p so p=(ptr/100)
r=25/4 so 1=(25*t)/(4*100)
t=16

Like? Yes (1) | No (3)  

siddharth   10 years AGO

25/4=6.25

6.25*16=100(which is double)

Like? Yes (1) | No (3)  

Himanshu porwal   10 years AGO

Let rs be deposit=100
Increase per year 6.25%
In one year= 100+6.25=106.25
In 2nd year=106.25+6.640625=112.89
For n year,100.(0.01.6.25)^n=200
n=16(approx)
option 7 is crrect

Like? Yes (1) | No (3)  

Nupur   10 years AGO

To double the money the Principal must be equal to the SI

SI = P*R*T/100

Keeping SI=P

p=p*25*t/400

t=16

Like? Yes (1) | No (3)  

m malathi   10 years AGO

1/16th of total money is obtained in a year
so we need 16 years

Like? Yes (1) | No (3)  

nagaprasad   10 years AGO

let x be the total principal amount.
so therefore the interest also must be x.
as we know already
interest= (principal*rate of interest*span of years)/100

x=x* r*(25/4)/(100)
x gets cancelled both sides
t=100*4/(25)
t=16.
span of years(t)= 16 years

Like? Yes (2) | No (4)  

Mahendra Dasari   10 years AGO

PTR/100 so if the given is x then we can say x*6.25*16/100 so we get 2x

Like? Yes (1) | No (3)  

rajesh   10 years AGO

S.I. = A - P = 2P – P = P
T = (100 × S.I)/(P × R) = ( 100 × P)/(P × 25/4) = 16 years

Like? Yes (3) | No (5)  

A M ANKIT KALLURAYA   10 years AGO

SI=PTR/100..

Like? Yes (2) | No (5)  

Anubhav jain   10 years AGO

ASSUME P=X S.I=X R=25/4%
T=?
S.I= P*R*T/100
T=16 YEARS

Like? Yes (1) | No (4)  

shubham jaiswal   10 years AGO

every year =6.25
100/6.25=100

Like? Yes (1) | No (4)  

04 Dec 2014 Time and Distance

A is twice as fast as B and B is thrice as fast as C is. The journey covered by C in 42 minute will be covered by A in:

OPtion

1) 14 minute
2) 7 minute
3) 28 minute
4) 54 minute
5) 32 minute
6) 20 minute
7) 24 minute
8) 45 minute
9) 50 minute
10)None of these

Solution

Let C's speed = x kmph,
B's speed = 3x kmph
& A's speed = 6x kmph
therefore Ratio of speeds of A, B, C = 6x :3x : x = 6:3:1
Ratio of times taken = 1/6 : 1/3 : 1 = 1 : 2 : 6
If C takes 6 min, A takes 1 min
If C takes 42 min,
A takes (1/6 * 42) min = 7 min
Option 2)

Correct Option: 2 Best Solution (39)

sai   10 years AGO

c = 42 minutes
B= 42/3=14 minutes
A= 14/2 =7 minutes

Like? Yes (26) | No (6)  

K.ARun   10 years AGO

speed of A,B and C is X,Y and Z km/hr resp.
x=3y=2(3z) = 6z
Dist covrd by C in 42mins = 42z
Time Taken by A=42z/x
we know x=6z
so A=42z/6z
Option 2) A will cover it in 7minute

Like? Yes (14) | No (4)  

Yekollu Muneeswar   10 years AGO

given,

A=B/2
B=C/3
C TAKE 42MIN
THEN B=C/3=42/3=14
A=B/2=14/2=7MIN
>> A TAKES 7 MIN

Like? Yes (9) | No (1)  

P.Pandeeswari   10 years AGO

If the speed of a,b & c are A,B & C respectively

Given A=B/2 & B=C/3 ,

So A=C/6, If time taken by c is 42 min.,

then by a= 42/6= 7min.

ans is

option 2) 7min

Like? Yes (7) | No (1)  

Rahul Rathod   10 years AGO

B=2A
C=3B
so C=6A
hence A=C/6
Speed of C=42
hence Answer is 7 minutes

Like? Yes (6) | No (3)  

ranjithreddy   10 years AGO

6times as c

Like? Yes (4) | No (1)  

Anant   10 years AGO

Since A is 6 times as fast as C , he will cover the same distance in 1/6th of the time C takes .

Like? Yes (3) | No   

priyanka    10 years AGO

if a=6y
b=3y
c=y
if c= 42 min
a=42/6=7 min

Like? Yes (2) | No   

Shivam Saluja   10 years AGO

C= x m/sec
B= 3x m/sec
A = 6x m/sec

C distance= 42*60*x m
A time = (42*60*x)/(6x*60) sec

Like? Yes (3) | No (1)  

chanukya reddy   10 years AGO

42/6=7

Like? Yes (4) | No (2)  

himasnhu joshi   10 years AGO

2a=b
3b=c thus a=7

Like? Yes (1) | No   

sreenivasa reddy   10 years AGO

c=let " X" then
B=3X
A=6X time to take A=42/6=7 Answer=7

Like? Yes (1) | No   

bhavani   10 years AGO

A speed= 2*speed of B
B speed= 3*speed of c
A speed= 6*speed of c
42/6=7

Like? Yes (1) | No   

Azhar Syed   10 years AGO

A=2B,
B=3C,
hence A=6C
if C covers journey in 42 min A should do it in 42/6 i.e 7min

Like? Yes (1) | No (1)  

Rahul   10 years AGO

distance by c=d
then by b=3d
a=6d hence
42/6

Like? Yes (2) | No (2)  

A.P.Singh   10 years AGO

A (6c) is twice as fast as B and B (3) is thrice as fast as C (c) is. The journey covered by C in 42 minute will be covered by A in 42/6=7 mins

Like? Yes (2) | No (2)  

Udhaya kumar   10 years AGO

A=2B
B=3C
IF C = 42 THEN B = 42/3 = 14
A = 14/2 = 7..............

Like? Yes (1) | No (2)  

Md.Sultan Khichi   10 years AGO

C covers the journey in 42 mins.
So B covers it in=42/3=14 mins
So A covers it in =14/2=7 mins
Ans. Ob. 2

Like? Yes (1) | No (2)  

ravi prakash   10 years AGO

A= 42/6
= 7minutes.

Like? Yes (1) | No (2)  

Anand   10 years AGO

Let the speed of A, B and C be x, y and z km/hr

x = 3y = 3(2z) = 6z

Distance covered by C in 42 minutes = 42z

Time taken by A = 42z/x = 42z/(6z) = 7 minutes

A will take 7 minutes

Like? Yes (1) | No (2)  

Devendra Marghade   10 years AGO

Time taken to cover the same distance by A= B/2 & B=C/3
So A=C/6 =42/6=7 minutes

Like? Yes (1) | No (2)  

CHANDAN KUMAR   10 years AGO

tb/tc=1/3
tb=tc/3=14
ta/tb=1/2
ta=tb/2=7

Like? Yes (1) | No (2)  

sravani   10 years AGO

Let speed of C be x...
B will be 3x
A will be 6x
x-----------42mins
6x----------- ?
7mins..

Like? Yes (1) | No (2)  

kamal   10 years AGO

S is inveresely preportional to T so,
let speed of C is S.
Speed of B is 3s
speed of is 6S
S1/S2=T2/T1
S/6S=T/42
T=42/6= 7 minutes

option 2 is right

Like? Yes (2) | No (3)  

Abhishek Porwal   10 years AGO

Given
A=2B , B=3C
and C=42
=> A=2(3C)
=>A=6C
So if C covers the distance in 42 minutes then A will cover the distance in 7 minutes.

Like? Yes (1) | No (2)  

Sundar Kumar   10 years AGO

Let the speed of A, B and C be x, y and z km/hr

x = 3y = 3(2z) = 6z

Distance covered by C in 42 minutes = 42z

Time taken by A = 42z/x = 42z/(6z) = 7 minutes

A will take 7 minutes

Answer: Option:2)

Like? Yes (1) | No (2)  

Anubhav jain   10 years AGO

7

Like? Yes (1) | No (2)  

prem   10 years AGO

speed of a = 2* speedof b
and speed of b=3*speed of c
tc=42 min
speed=dist/time
t=dist/speed
tb=42/3=14
ta=14/2=7
hence option 2

Like? Yes (1) | No (2)  

Rishikesh Ranjan   10 years AGO

42/6

Like? Yes (1) | No (2)  

arun   10 years AGO

Given
A = 2B
B = 3C
So A= 6C
A is 6 times faster than C
The journey covered by C in 42 minute will be covered by A is =42/6 = 7

Like? Yes (1) | No (2)  

vedhasree   10 years AGO

time taken by c=42 min
time taken by B=42/3=14 min
time taken by A=14/2=7 min

Like? Yes (1) | No (2)  

PAWAN KUMAR   10 years AGO

We have, a = 2b , b = 3c
i.e, a = 2b = 2*3c = 6c
time taken by c= 42 min
So, time taken by a = 42/6 = 7 min. Ans.

Like? Yes (2) | No (3)  

poojasaisri   10 years AGO

a=2b
b=3c
=>a=6c
distance covered by a=distance covered by c
t*60*6s=s*42*60
t*6=42
t=7minutes

Like? Yes (1) | No (2)  

thota mahendar   10 years AGO

a covered in 42/(3*2)

Like? Yes (1) | No (2)  

sanjeev kumar   10 years AGO

ans 2

Like? Yes (1) | No (2)  

Nitesh   10 years AGO

C covered the journey in 42 minutes
where as B's speed is 3B=C
so B covered the journey in 14 minutes
then 2A=B
A covered the journey in 7 minutes

Like? Yes (1) | No (2)  

Arul Shaijan   10 years AGO

A=2B, B=3C
so, A=6C,

Hence time of A=1/6(C's time) i.e, 1/6*(42).

7mins

Like? Yes (2) | No (3)  

Arijit Acharyya   10 years AGO

Speed ratio A:B=2:1 ; B:C=3:1

distance covered by C = S*T = S*42 = 42S
to cover 42S B will take 42S/3S = 14 minute
and A will take 14/2 = 7 minute

Like? Yes (1) | No (2)  

Manasa Kotha   10 years AGO

a=2b and b=3c
so a=6c means a is 6 times fast as c so time taken =42/6=7

Like? Yes (1) | No (3)