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Maths Quotes

Don't learn Mathematics just to prove that you are not a mentaly simple person but learn it to prove that you are enough intelligent

A man has one hundred dollars and you leave him with two dollars. That's subtraction.

Mae West

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yash mittal 5 years ago

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(9 years ago) "Other"

how many zeros in 10!

Reply Like? Yes (1) | No

(9 years ago)

zeros in 10! = 2
one because of 5*2
and other because of 10 itself.

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to (9 years ago) "Other"

Mamana ka h na tu

Reply Like? Yes (1) | No

(9 years ago) "Other"

Hi, i have recently given elitmus ph test and my scores are following..
Verbal 90.33 percentile
Problem Solving 50.91 percentile
Quantitative 93.73 percentile

What are my chances?

Reply Like? Yes (1) | No

(9 years ago) "Other"

find the sum to n terms of the series 5.6.7+6.7.8+7.8.9+8.9.10............n terms

Reply Like? Yes (1) | No

(9 years ago)

nth term = (n+4)(n+5)(n+6)
= n^3 + 15n^2 + 74n + 120
summation all
((n(n+1)/2)^2 + 15(n(n+1)(2n+1)/6) + 74(n(n+1)/2) + 120n)
=n^4 + 22n^3 + 179n^2 + 158n + 480

Like? Yes (1) | No

to (9 years ago) "Other"

mam previous paper is enough to crack tech mahindra

Reply Like? Yes (1) | No

(9 years ago) "Other"

A boat sails downstream from point A to B, which is 10 km away from A, and then returns to A. If the actual speed of the boat(in still water) is 3 km/h, the trip from A to B takes 8 hours less than that from B to A. What must be the actual speed of the boat for the trip from A to B to take exactly 100 minutes ?

Reply Like? Yes (1) | No

(9 years ago)

distance is 10 km
boat speed b=3km/h
let stream speed be v
trip from A to B takes 8 hrs less than from B to A i.e.,
time taken for upstream-time taken for downstream=8
t(up)-t(down)=8
=>(10/(3-v))-(10/(3+v))=8
if we solve above eq we will get v as 2
so stream speed=2km/h
from A to B 100 min i.e., 5/3hr
for to reach in 5/3hr let boat speed be u
(10/u-2)=5/3
=>30=5u-10
u=8
so, boat speed should be 8km/h to reach in 100 min

Like? Yes (1) | No

(9 years ago) "Other"

5. Kate wanted to buy 2kgs of apples. The vendor kept the 2kg weight on the right side and weighed 4 apples for that. She doubted on the correctness of the balance and placed 2 kg weight on the left side and she could weight 14 apples for 2 kgs. If the balance was correct how many apples she would have got?

Reply Like? Yes (1) | No

(9 years ago) "Other"

3 men & 4 women finish 25% of work in 4 days while 8 men & 15 women can finish the whole work in 5 days. In how many days will 13 women finish it?

Reply Like? Yes (1) | No

(9 years ago)

10 days

If 1 day work of a man=m and a woman=w, then
3m+4w=(100/25)*(1/4)=1/16 ---(i) &
8m+15w=1/5 ---(ii)
On solving (i) & (ii), w=1/130, so 13w=1/10
So 13 women will finish the work in 10 days

Like? Yes (3) | No

(9 years ago) "Other"

Find out a number which when divided by 7 leaves a remainder of 5, when divided by 6 leaves a remainder of 4, when divided by 5 leaves a remainder of 3, when divided by 4 leaves a remainder of 2, and when divided by 3 leaves a remainder of 1?

Reply Like? Yes (1) | No

(9 years ago)

This can be solved by a simple piece of C code:

#include
int main()
{
int num;
for(num=1;;num++)
{
if(num%7==5 && num%6==4 && num%5==3 && num%4==2 && num%3==1)
{
printf("%d",num);
break;
}
}
return 0;
}

Like? Yes (1) | No

(9 years ago) "Other"

A, B and C are employed to do a piece of work for Rs.529. A and B together are supposed to do 19/23 of the work and Band C together 8/23 of the work. What amount should A be paid?

Reply Like? Yes (1) | No

(9 years ago)

salary of each employ= total salary/number of days worked

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(9 years ago) "Other"

A 10 foot rope ladder hangs over the side of a boat with the bottom rung on the surface of the water. The rungs are one foot apart, and the tide goes up at the rate of 6 inches per hour. How long will it be until three rungs are covered?

Reply Like? Yes (1) | No

(9 years ago)

Answer is never.
As the boat rises with the tide,
the bottom rung of the ladder also rises with the boat. For the WIN, the bottom rung remains at the water surface

Like? Yes (2) | No

(9 years ago) "Other"

function modify(w,u) { w = w + 2 u = u - 3 return (w - u) } function calculate( ) { integer a = 10, b = 20, c c = modify(a, b); print a print space print b } Assume that a was passed by value and b was passed by reference. What will be the output of the program on executing function calculate( ) ? Op 1: 12 17 Op 2: 10 17 Op 3: 12 20

Reply Like? Yes (1) | No

(9 years ago)

op-2
the value of a is independent of its formal arguments as it was passed by value

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(9 years ago) "Other"

One man or two women or three boys can do a work in 44 days then one man, one women and one boy together can finish the same work in ---- days

Reply Like? Yes (1) | No

(9 years ago)

1 man -- 44d
2 women -- 44d
so 1 women -- 88d
3 boys -- 44d
1 boy -- 44*3 = 132d
1/44 + 1/88 + 1/132 = 1/24
they will do it in 24days

Like? Yes (2) | No

(9 years ago) "Other"

One monkey climbs 6 mts and fall 3 mts in alternate minutes then time taken to climb a tree 60 meters high?

Reply Like? Yes (1) | No

(9 years ago)

60-6=54
54/3=18
so no. of steps = 18+1 =19

Like? Yes (1) | No

(9 years ago)

A monkey climbs 6 mts in first minute and falls 3mts in next minute.

In 2 minutes, it will move by 6-3=3 metres.
so, In 1 min, it will move by 1.5 mtrs.
It will move 54 mtrs in 54/1.5 = 36 mins.
Next 6 mtrs will be covered in 37th min.
Ans- 37 mins.

Like? Yes (2) | No

(9 years ago) "Other"

Two train are standing at place Jalandhar and other at Bhilai.Distance between them is 27 km.At 6am the train at Jalandhar starts at the rate of 5 km/hr and at the same time train from Bhilai start at the rate of 7km/hr.When both train reach the other station they reverse the direction.Find after how many hr they will meet second time at the mid-point of both train?
a)40.5
b)BHUL GAYA
c)BHUL GAYA
d)10

Reply Like? Yes (2) | No

(9 years ago)

SORRY ITS BETWEEN BOTH STATION LAST WORD OF QUESTION. I GOT the answer 40.5 hr.

Like? Yes | No

(9 years ago)

E LITMUS 11 oct question.

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to (9 years ago) "Other"

Rakesh can u give me ur mail id>
this is my mail id udayareddy443@gmail.com

Reply Like? Yes | No (1)

(9 years ago) "Other"

A number when divided by D leaves a remainder of 8 and when divided by 3D leaves a remainder
of 21 . What is the remainder left, when twice the number is divided by 3D?

Reply Like? Yes (1) | No

(9 years ago)

Let the no. is a
a = Dx +8 (x is the quotient )
a = 3Dy + 21 (y is the quotient )
So from above equations we get
D(x-3y) = 13
becoz 13 is prime, so x-3y has to be 1
let x = 4 and y = 1
We get a = 60 and D=13
2a = 120
So 120 when divided by 3D = 39 (when twice of number is divided by 3D)
we get remainder as 3 (120/39)
So answer is 3

Like? Yes (1) | No

(9 years ago) "Other"

Zada has to distribute 15 chocolates among 5 of her children Sana, Ada, Jiya, and Farhan. She has to make sure that Sana gets at least 3 chocolate and at most 6 chocolates. In how many ways can this be done?

Reply Like? Yes | No

(9 years ago)

Distribute 1 chocolate among all four then left chocolates are 11.
case 1 when sana get 3 chocolates: ( 8+4-1)C(4-1) = 11C3 = 165
case 2 when sana get 4 chocolates 10C3 = 120
case 3 sana get 5 chocolates 9C3 = 84
case 4 sana get 6 chocolates 8C3 = 56
so, total ways are 165 + 120+ 84+56 = 425

OR (other approach)

Distribute 1 chocolate to all children and sana get 3 chocolates initially remaining is 8 chocolate.
so, way to distribute is (8+5-1)c(5-1)=495

now subtract upper limit (at most 6 chocolates) from 495 which is (4+5-1)c(4)= 70,

so ans is 425

Like? Yes | No

(9 years ago) "Other"

on what dates f april,2001 did wed fall?
a) 4,11,18,25 b)4,11,20,28 c)4,11,24,30

Reply Like? Yes | No

(9 years ago)

1st april 2001 will be sun(jan -- 3 , feb -- 0 , mar -- 3 = 6 odd days so next day will be sun)
so wed will fall on 4,11,18,25

Like? Yes (1) | No

(9 years ago) "Other"

how to solve the time and work

Reply Like? Yes | No

(9 years ago)

let me give you simple logic if want to eat big cake piece in 4 days then u can eat 1/4th in 1st day&& 1/4th in second day && 1/4th in third day &&1/4 in fourthday .....means daily u are eating 1/4th of the cake(it means ur day work is 1/4) to finish it in 4 days.....similarily if u want to build a wall in 10 days then ur one day work should be 1/10th......and 1/10th is ur day work then how many days u can complete means...think it will take x days and ur xdays of day work should be 1 i.e., x(1/10)=1=>x=10
so follow this..and remember without thinking u cant solve aptitude questions just on formulaes....so keep practicing and think always....one day u will be in good position

Like? Yes (1) | No

(9 years ago) "Other"

How many ways to select 12 books from 6 hindi books,6 english books and 3 maths books?

Reply Like? Yes | No

(9 years ago)

154 ways. 12! / (6!*6!*3!)

Like? Yes | No

(9 years ago)

15C12(total books = 6+6+3 = 15)

Like? Yes (1) | No

(9 years ago) "Other"

find the value of (0.75*0.75*0.75-0.001) / (0.75*0.75-0.075+0.01)

Reply Like? Yes | No

(9 years ago) "Other"

How many 4 letter words may be formed by using the letters of the word "ASSASSINATION" of type like this aabb?

Reply Like? Yes | No

(9 years ago)

12
repeated letters = {A,S,I,N}
selecting 2 from these = 4C2 = 6
and they can enterchange their positions so, 4C2 * 2! = 6 * 2 = 12

Like? Yes | No

(9 years ago)

@kriti kankariya
hey go for my nxt question and solve

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(9 years ago) "Other"

How many 3 letter word can be formed from CALCUTTA

Reply Like? Yes | No

(9 years ago)

repeatition is allowed or not??

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(9 years ago)

@kriti kankariya
go for both

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(9 years ago)

if repeatition is allowed then their are 5 diff letters for 3 positions
and all can have same values
so, 5*5*5 = 125 ways
(not sure but most prob. it is correct)

Like? Yes | No

(8 years ago)

7c3=35/2!*2!*2!
this is a how we make word form 3 letter

Like? Yes | No

(9 years ago) "Other"

if A^B means A raised to the power of B, in which of the following choices must P be greater than Q
a) 0.9^P=0.9^Q
b) 0.9^P=0.92^Q
c) 0.9^P>0.9^Q

Reply Like? Yes | No

(9 years ago) "Other"

selling 28 articles a man losses the cost price of 4 articles,then what is the loss %
a.14(2/7)% b.22(2/7)% c.10(2/7)% d.16(2/7)%

Reply Like? Yes (1) | No

(9 years ago)

a. 14(2/7)%

If for each article CP=x and SP=y, then 28x-28y=4x , 6x=7y , y/x=6/7
So % loss=100- 100*(y/x)=100- 100*6/7=100/7 or 14 2/7

Like? Yes | No

(9 years ago) "Other"

A computer routine was developed to generate two numbers (x,y) the first being a random number between 0 and 100 inclusive, and the second being less than or equal to the square root of the first. Each of the following pair satisfies the routine EXCEPT

Reply Like? Yes (1) | No

(9 years ago)

options.....................???

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to (9 years ago) "Other"

hiiiii how r u?
i think u forget me right?

Reply Like? Yes | No

to (9 years ago) "Other"

hiiii how r u? w r u

Reply Like? Yes | No

to (9 years ago) "Other"

Hi..Anjali .. plz share your experience of eLitmus test of 11 Sept .

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to (9 years ago) "Other"

hai medam how are you ,you are multitalented my name is vijay

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(9 years ago)

hi vijay..............................................

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to (9 years ago) "Other"

hai medam how are you what are you doing?

Reply Like? Yes | No

(9 years ago)

hiiiii... i am gud

Like? Yes (2) | No

(9 years ago) "Other"

A certain sum of money amounted to Rs 584 at 6% in a certain time in which Rs.720 amounted to Rs.850 at 5%. If the rate of interest is simple. Find the sum.

Reply Like? Yes (1) | No

(9 years ago)

let money be x and time be t
then,(x*6*t)/100 + x= 584
(720 * 5 * t )/100 + 720 = 850
t = 68/18
substituting in first equation,
(x*6*68/18)/100 + x= 584
on solving x=476rs

Like? Yes (1) | No (1)

to (9 years ago) "Other"

hi lets be frnd on fb if u r intersted

Reply Like? Yes | No

(9 years ago) "Other"

Statements: All red are white. Some white are pink.
Some pink are yellow. No yellow is blue.
Conclusions: I. No blue is pink.
II. Some pink are red.
III. Some blue are red.
IV. Some blue are pink.
(1) None follows
(2) Only either I or IV follows
(3) Only I follows
(4) Only III & IV follow
(5) All follow

ans is 2 how?anybody plz?

Reply Like? Yes | No

(9 years ago) "Other"

Sum of the digits in the product of (16^100)*(125^135) is

Reply Like? Yes | No

(9 years ago)

Sum of digit is: 11
16^100=> 2^4^100 => 2^400
125^135=>5^3^135 => 5^405 => (5^400)*5^5
Put these values in equation
(16^100)*(125^135)
(2^400)*(5^400) *(5^5)
(10^400) *(5^5)
3125 *(10 400 times)
sum is :3+1+2+5=11

Like? Yes (1) | No

(9 years ago) "Other"

In June, a baseball team that played 60 games had won 30% of its game played. After a phenomenal winning streak, this team raised its average to 50%. How many games must the team have won in a row to attain this average?

Reply Like? Yes | No

(9 years ago)

no. of games won in 60 games = 30*60/100 = 18
now if they played x more games and suppose won all of them then,
(18+x) * 100 / (60+x) = 50
on solving, x=24games

Like? Yes | No

to (9 years ago) "Other"

hey u hav got a splendent face....kasam se

Reply Like? Yes | No (1)

to (9 years ago) "Other"

Hii where do u live?

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(9 years ago) "Other"

1
5 4
1 4 4 4 1

how to write this program in c..plzz ans any1

Reply Like? Yes | No

(9 years ago)

void main()
{
printf("1
");
printf("5 4
");
printf("1 4 4 4 1
");
getch();
}

Like? Yes (1) | No

to (9 years ago) "Other"

hai yugandhar garu..meru rasina books novels chadivanu...u r really great sir...sir
will you tell me when you are releasing the sequel of "musalodi mancham"

Reply Like? Yes (1) | No

(9 years ago) "Other"

how many such letters pairs r in word MONKEY having
same no. of letters left between them in the word as they
have in the series

Reply Like? Yes | No

(9 years ago)

Answer is ON
one pair is observed that is (ON) as there is no alphabet in between them and in series also there is no letter in between them.

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(9 years ago) "Other"

In T.Nagar the building were numbered from 1 to 100.Then how many 1’s will be present in the numbers

Reply Like? Yes | No

(9 years ago)

20 simple
1,
10,11,12,13,14,15,16,17,18,19,
21,31,41,51,61,71,81,91,100

only Zero is a no which is present 21 times remaining are 20 times only

Like? Yes (1) | No

(9 years ago) "Other"

Hi I got 81 percentile in problem solving 83 percentile in quantitative but only 36 percentile in varbal. Should I get call from any company?

Reply Like? Yes | No

(9 years ago)

Probably no because they want a constant performance.
and there is huge difference between your score. Improve your verbal.

Like? Yes (1) | No

to (9 years ago) "Other"

thanks for best ans

Reply Like? Yes | No

(9 years ago)

or we can do this by simply calculating SI for x years on the difference between the two principles.
like
(150*4*x)/100 = 30
x=5

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to (9 years ago) "Other"

Hiii how r u were do u live

Reply Like? Yes | No

(9 years ago) "Other"

Statements: All pens are books

No pencils are books

Conclusion: 1. All books are pencils

2. All pencils are books

3. Some pencils are books

4. None

Reply Like? Yes | No

(9 years ago)

I think question is incomplete or all conclusion are false.
because 2nd statement shows that no pencils are book so no relationship exist between both of them as per the statement.
However other than that there may be any relationship may be there.
but here we only consider statement as TRUE.
So Answer will be (4) NONE

Like? Yes | No

(9 years ago) "Other"

A man ate 100 apple in five days daily he ate more than 6 apples when compare to previous day how many apples he ate in first day?

Reply Like? Yes (2) | No

(9 years ago)

at starting day he ate 8 apples

Like? Yes (1) | No

(9 years ago)

hey howwww? plz explain briefly

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to (9 years ago) "Other"

hi lets be frnd on fb if u r intersted

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(9 years ago) "Other"

3+5+6= 151872
5+5+6= 253094
5+6+7= 303585
5+5+3= 251573
Then
9+4+7= ________?

Reply Like? Yes | No

(9 years ago)

3+5+6
1st 2 digits- 3*5=15
next 2 digits - 3*6=18
last 2 digits -
(a*b)+(a*c)-c = 15+18-6 = 27
reverse of 27 is 72

Final value 151872

Like? Yes (1) | No

(9 years ago)

hai how are you my answer is 366329

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