M4maths Previous Puzzles

06 May 2015 Probability

A four digit number has all non zero different even digits. What is the probability that first three digits are in increasing order.

OPtion

1) 1/2
2) 1/3
3) 1/4
4) 1/6
5) 1/8
6) 3/4
7) 4/5
8) 3/8
9) 4/9
10)2/3

Solution

Possible digit are 2, 4, 6, 8
Total no of numbers = 4*3*2*1 = 24
Favourable no of numbers = 4*1 = 4
So Probability = 4/24 = 1/6

Option 6)

Correct Option: 4 Best Solution (28)

Anuradha   9 years AGO

possible digits are 2,4,6,8
increasing order- 246,248,268,468=4
total 3 digit numbers that can be formed=4 * 3* 2=24
Probability=4/24(numbers in increasing order/total number that can be formed)=1/6

Like? Yes (8) | No   

Supriya Mondal   9 years AGO

Four different even digits are 2,4,6,8.
There are total 4*3!=24 numbers of 4 digit number can be form using the above 4 digits.
Only 4 four digits numbers are possible whose first 3 digits are in increasing order.
They are-
i)2468
ii)2486
iii)2684
iv)4682
so, probability that first three digits are in increasing order will be=4/24=1/6
so, option 4)1/6 is the right answer

Like? Yes (3) | No   

moumita   9 years AGO

total no of ways (without repetation) =4! = 24
possibility of first 3 digits in increasing order is-
(i) fixing 8 at the third position , no of ways 3C2 = 3 ways
(ii) fixing 6 at the third position , no of ways 2C2 = 1 way
total possibilities = 3 +1 =4 ways
therefore, probability = 4/24 = 1/6
Ans ( 4) 1/6

Like? Yes (2) | No   

aman aditya   9 years AGO

Total no. possible=4*3*2*1=24
numbers which satisfy the condition are 4 i.e 2468,2486,2684,4682
so 4/24=1/6

Like? Yes (1) | No   

neha gupta   9 years AGO

First we will find total numbers that can be formed using digits 2,4,6,8. they are 4!=24
As first three digits should be in increasing order thus the following four combinations are favourable:
2468
2486
2684
4682
So probability=4/24=1/6

Like? Yes (1) | No   

SAURABH KUMAR SINHA   9 years AGO

The even digits that will form numbers are 2,4,6,8.
So, 4! numbers can be formed using these digits.

Out of which 2468,2684,2486,4682 are those numbers in which first three digits are in increasing number.
So,the required probability = 4÷4!=4÷24=1/6. Ans.

Like? Yes (1) | No   

deepak   9 years AGO

even digits are 2,4,6,8
possible combinations for the 1st 3 digits are 246,248,268,468
and total no. of arrangements possible are 4!
so probability = 4/4!=(1/6)

Like? Yes (1) | No   

Neha Shahi   9 years AGO

first three even digits can be arranged in 4 ways
total no of ways in which 4 non zero even digits can be arranged= 4! =24
so, answer is 1/6

Like? Yes (1) | No   

Yathiraj   9 years AGO

From the below 24 combinations,
2468 4682 6824 8246
2486 4628 6842 8264
2648 4862 6284 8426
2684 4826 6248 8462
2846 4268 6428 8624
2864 4286 6482 8642

the only probabilities are 2468, 2486, 2684 and 4682

so, probability = 4/24 = 1/6

Option 4.

Like? Yes (1) | No   

Adesh   9 years AGO

Total occurence = 4! = 24.
Favourable occurence - 4(2468,2486,2684,4682).

Hence,
Probability= 4/24=1/6.

Like? Yes (1) | No   

vivek raj   9 years AGO

no of favorable outcomes = 2(2468,4682)

total outcomes= 4*3*2=12

p(e)=1/6

Like? Yes (1) | No   

vivek   9 years AGO

total 4 digit no. having all different even number is 4*3*2*1=24
and, desire no. with first three digit in increasing order is 2468,2684,2486,4682=4
so, required probability is 4/24= 1/6

Like? Yes (1) | No   

ksrn theja   9 years AGO

Number starts with only 2 and 4.

Like? Yes (1) | No   

Dileepkumar Palli   9 years AGO

Total number of possibilities =24
Required possibilities are
2468
2684
2684
4682
So probability =4/24=1/6

Like? Yes (1) | No   

Ramesh Sriram   9 years AGO

4 such combinations
4/4!=1/6

Like? Yes (1) | No   

Sirisha   9 years AGO

total no of ways= 4!
favourable cases in frst 3 digits are 246,248,268,468, and last digit is 8 it is 4/24 = 1/6

Like? Yes (1) | No   

atmakuri jagadish   9 years AGO

total samples are 24.
Incresing digits samples are :
2684
2468
2486
4682
which is total 4
so probability is 4/24 - 1/6

Like? Yes (1) | No   

prabhat kumar sharma   9 years AGO

only 4 even digit are available i.e
2,4,6,8
thus total no of ways to arrange them is 4!=24
accrdng to question we can arrange these no in 4 different ways i.e
2468
2486
2684
4682

therefore required probability is = 4/24=1/6

Like? Yes (1) | No   

B Harish Babu   9 years AGO

non zero different even numbers-2,4,6,8
number of ways selecting 3 numbers from the 4 possible numbers=number of ways of arranging first 3 numbers in increasing order=4c3=4
the last number being the remaining number after selecting 3 numbers.'
number of possible 4digit numbers with these conditions=4c3*1=4
total number of 4-digit numbers with non zero different even digits=4*3*2*1=24
probability=4/24=1/6
so option 4 is correct.

Like? Yes (1) | No   

ankit kamboj   9 years AGO

2468 , 2486, 2684 , 4682 are four favourable case out of 24 case so probability = 4/24= 1/6

Like? Yes (1) | No   

ashvini kumar   9 years AGO

no. of ways of forming 4 digit nos with 2,4,6,8=24
no of ways when first three digit in increasing order=4 (2468,2486,2684,4682)
required probability=4/24=1/6

Like? Yes (1) | No   

Mithun Kumar Kesari   9 years AGO

1/6.
let numbers are 1,2,3,4
now possible combinations are (1,2,3), (1,2,4), (1,3,4), (2,3,4)
so total ways = 4
probability = 4/24= 1/6

Like? Yes (1) | No   

kalyani   9 years AGO

first of all, we do have 2468,2486,2684,4682 as the favorable cases satisfying the requirement(first three even digits should maintain increasing order). the total possible cases of getting a 4 digit number with distinct even digits apart from 0 are 4! so finally the probability is 4/4!=1/6

Like? Yes (1) | No   

shaik sharina   9 years AGO

no of possibilities=4[(2,4,6)(2,6,8)(2,4,8)(4,6,8)]
total no of possibilities=24
probability=4/24=1/6

Like? Yes (1) | No   

a.k.gayathridevi   9 years AGO

possibilities
{2 4 6},{2 4 8},{2 6 8},{4 6 8} among 24 combinations
4/24=1/6

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Math Lovers   9 years AGO

Total four digit number = 9*8*7*6

Now first three digits are in increasing order
Number starts from 1 = [7*8/2]*6
Number starts from 2 = [6*7/2]*6
Number starts from 3 = [5*6/2]*6
Number starts from 4 = [4*5/2]*6
Number starts from 5 = [3*4/2]*6
Number starts from 6 = [2*3/2]*6
Number starts from 7 = [1*2/2]*6

so total such number = 84*6

hence prob = (84*6)/( 9*8*7*6 ) = 1/6

Like? Yes (1) | No   

SAGNIK DATTA   9 years AGO

Total possibility =(4*3*2*1)
Favourable cases ; (2,4,6) (2,4,8) (2,6,8) (4,6,8)
so probability =4/24=1/6

Like? Yes (1) | No   

SUSHANT KUMAR   9 years AGO

probability =1/6
total such word possible =1
and total arrangements =6

Like? Yes (1) | No (1)  

05 May 2015 Average Marks of the calss

The detail of a class test are as given below
Marks -- No of Student
2 --------- 4
3 --------- 7
4 --------- 10
5 --------- 15
6 --------- 8
7 --------- 5
8 --------- 1
average marks of the class will be

OPtion

1) 4.5
2) 4.6
3) 4.7
4) 4.8
5) 4.9
6) 5
7) 5.1
8) 5.2
9) 5.3
10)5.4

Solution

Sum of all student marks = 235
Total student = 50
So average marks = 235/50
= 4.7

Option 3)

Correct Option: 3 Best Solution (55)

Supriya Mondal   9 years AGO

Total marks={(2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)}
=235
Total student=4+7+10+15+8+5+1
=50
So, average marks of the class=235/50=4.7
So, option 3)4.7 is the right answer

Like? Yes (7) | No (3)  

moumita   9 years AGO

total marks = 2*4+3*7+4*10+5*15+6*8+7*5+8*1 = 235
total no of students =4+7+10+15+8+5+1 = 50
avg = 235/50 = 4.7
Ans (3) 4.7

Like? Yes (3) | No (1)  

Koustubh Bhardwaj   9 years AGO

avg marks = summation of mark scored multiplied by no. of students scored whole divided by total no. of students

Like? Yes (2) | No   

b.subbarao   9 years AGO

2*4=8
3*7=21
4*10=40
5*15=75
6*8=48
7*5=35
8*1=8
total students=50
total marks=235
average marks=235/50=4.7

Like? Yes (2) | No   

ADERU CHENCHU NITHISH   9 years AGO

avg=ratio of sum of products of marks and No of student to the sum of no of students
avg=235/50=4.7 ans

Like? Yes (2) | No   

aman aditya   9 years AGO

(8+21+40+75+48+35+8)/50=4.7

Like? Yes (2) | No (1)  

Devendra Marghade   9 years AGO

Average marks=Total marks/number of students
=(2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)/50
=23.5/50=4.7
So answer= Option (3)

Like? Yes (2) | No (1)  

Diwakar Verma   9 years AGO

multiply marks with student and divide by total no of students

Like? Yes (2) | No (1)  

SUSHANT KUMAR   9 years AGO

total marks= 2*4+3*7+4*10+5*15+6*8+7*5+8*1
=235
now total no of students=4+7+10+15+8+5+1=50
so avg= 235/50
=4.7

Like? Yes (2) | No (1)  

SAGNIK DATTA   9 years AGO

total marks=(2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)=235
total students=4+7+10+15+8+5+1=50
so average=total marks/toale students = 4.7

Like? Yes (2) | No (1)  

Madhumoy Gope   9 years AGO

Total nos got =(2*4+3*7+4*10+5*15+6*8+7*5+8*1)=235
Total no of student=4+7+10+15+8+5+1=50
So,avg no of class =235/50=4.7

Like? Yes (2) | No (1)  

shubham sharma   9 years AGO

average=(4x2 + 7x3 + 10 x 4 + 15x5+ 8x6+ 7x5+ 8x1)/50
=4.7

Like? Yes (2) | No (1)  

Surya Rajitha   9 years AGO

Total no. of student= 4+7+10+15+8+5+1=50

average marks = (8+21+40+75+48+35+8)/50= 4.7

Like? Yes (2) | No (1)  

suraj nath prasad   9 years AGO

av marks=4*2+3*7+4*10+5*15+6*8+7*5+8*1/no of students

Like? Yes (2) | No (1)  

sravani   9 years AGO

Sigma(marks*persons)/total persons=4.7

Like? Yes (2) | No (1)  

ANANTHI.P   9 years AGO

(MARKS*NO.OF STUDENTS)/TOTAL NO.OF STUDENTS
(2*4+3*7+4*10+5*15+6*8+7*5+8*1)/50=235/50=4.7

Like? Yes (2) | No (1)  

kranthi kanchanapally   9 years AGO

Total number of students is=50
then marks*num of students=2*4+3*7+4*10+5*15+6*8+5*7+8*1=235
then avg=235/50=4.7

Like? Yes (1) | No   

neha gupta   9 years AGO

to find average we will use method of mean.
first we will find the sum of (multiplication of marks and frequency)as follows:
(4*2)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)=235
now divide it with total number of students
235/50=4.7

Like? Yes (2) | No (1)  

sumit bansode   9 years AGO

2×4+3×7+.....+8×1=235
4+7+10+15+8+5+1=50
avg=235/50=4.7

Like? Yes (2) | No (1)  

Arya Nivas   9 years AGO

(2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)/4+7+10+15+8+5+1
=>235/50=4.7

Like? Yes (1) | No   

kambalanaresh   9 years AGO

4 students got 2 marks average i.e 4*2=8 7 students got 3 marks average i.e7*3=21 ,10 students got 4 marks average i.e 10*4=40,15 students got 5 marks average i.e 15*5=75,8 students got 6 marks average i.e 8*6=48,5 students got 7 marks average i.e 7*5=35,1 student got 8 marks average i.e 1*8=8 so toal maeks is 235 and total students is 50 so average is 4.7

Like? Yes (1) | No   

siddharth prakash singh   9 years AGO

avg marks= total marks/ total no of students
=(8+21+40+75+48+35+8)/(4+7+10+15+8+5+1)
235/50
=4.7

Like? Yes (1) | No   

Aditi Tenguria   9 years AGO

total marks= 4*2+7*3+4*10+5*15+6*8+7*5+8*1=. 235
total students=50
average marks=235/50 =4.7

Like? Yes (1) | No   

SAURABH KUMAR SINHA   9 years AGO

Total marks of the class=235.
Total Students in the class=50
So,Required average=235÷50 =4.7. ANS.

Like? Yes (1) | No   

sompon temtheerakij   9 years AGO

[(2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1)]/50 = 4.7

Like? Yes (1) | No   

Vaibhav Srivastava   9 years AGO

Total Marks = Marks * Number of Students
= (4*2) + (7*3) + (10*4) + (15*5) + (8*6) + (5*7) + (1*8)
= 235
Total number of Students = 4+7+10+15+8+5+1
= 50
Average = Total Marks / Total number of Students
= 235 / 50
= 4.7
So, option 3) 4.7 is correct.

Like? Yes (1) | No   

Meenakshi   9 years AGO

Total number of students=50
Average marks of the class=(4*2)+(7*3)+(10*4)+(15*5)+(8*6)+(5*7)+(1*8) =235/50
=4.7
option 3)

Like? Yes (1) | No   

siva naga kumar   9 years AGO

(8 21 40 75 48 35 8)/50
=4.7

Like? Yes (1) | No   

DEBAYAN BASU   9 years AGO

(2*4+3*7+4*10+5*15+6*8+7*5+8*1)/(4+7+10+15+8+5+1)=4.7

Like? Yes (1) | No   

Abhishek Ranjan   9 years AGO

Total marks = 227
total students = 50
average marks= 227÷50= 4.7

Like? Yes (1) | No   

Harshaa K   9 years AGO

Avg=(4*2+7*3+10*4+15*5+8*6+5*7+8*1)/(4+7+10+15+8+5+1)=235/50=4.7

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

2*4+3*7+4*10+5*15+6*8+7*5+8*1/50=235/50=4.7

Like? Yes (1) | No   

shaik kajal begum   9 years AGO

(2×4+3×7+4×10+5×15+6×8+7×5+8×1)÷50=4.7

Like? Yes (1) | No   

Vishal Kharche   9 years AGO

Total students = 50
Total marks = 235
Average= 235/50= 4.7

Like? Yes (1) | No   

M.Ranjith Kumar    9 years AGO

total no of stu=50
Total mark of all stu=235
So Avg mark of stu=235/50=4.7

Like? Yes (1) | No   

PAWAN KUMAR   9 years AGO

Total marks = 235
Total students = 50
So, average = 235/50 = 4.70

Like? Yes (1) | No   

Rahul Verma   9 years AGO

avg marks of the class will b summation of marks obtained by all the students divided by the no of students.
i.e. (2*4+3*7+4*10+5*15+6*8+7*5+8*1)/(4+7+10+15+8+5+1)
=235/50
=4.7

Like? Yes (1) | No   

Neha Shahi   9 years AGO

TOTAL MARKS = 235
TOTAL NO OF STUDENTS = 50
AVERAGE MARKS OF THE CLASS = 235/50 = 4.7

Like? Yes (1) | No   

KIRANKUMARREDDY   9 years AGO

avg=total no of marks/no of students

Like? Yes (1) | No   

sai   9 years AGO

69+75+48+35+8/50 =4.7

Like? Yes (1) | No   

Pranati Kundu   9 years AGO

total marks/ total students
=235/50
=4.7

Like? Yes (1) | No   

kishore   9 years AGO

2*4 + 3*7 + 4*10 + 5*15 + 6*8 + 7*5 + 1*8 = 235 = total
no.of students = 4+7+10+15+8+5+1 =50
so avg = 235/50 = 4.7

Like? Yes (1) | No   

prashant kumar choudhary   9 years AGO

after calculating total no of student it comes 235 that is div by no of student 50 which is equel to 4.7

Like? Yes (1) | No   

poojasaisri   9 years AGO

Average= ( sum of the quantities ) / (Number of quantities)
=(8+21+40+75+48+35+8)/50
=235/50
=4.7

Like? Yes (1) | No   

AJIT SINGH   9 years AGO

AVERAGE = (SUMMATION OF MARKS)/ TOTAL NO OF STUDENTS

Like? Yes (1) | No   

Supreeth R   9 years AGO

no of students : 50
total no of marks scored by students : 235
avg : 235/50= 4.7

Like? Yes (1) | No   

CROSSWIN   9 years AGO

Sum of (no.of Marks in each category*no.of Student in each category)/no.of student

Like? Yes (1) | No   

vibhu raj gupta   9 years AGO

toatal marks=235
total student=50
avg marks=235/50=4.7

Like? Yes (1) | No   

Yekollu Muneeswar   9 years AGO

Total # of students in class: 4+7+10+15+8+5+1 = 50
total marks of the class: 8+21+40+75+48+35+8 = 235
2*4=8
3*7=21
4*10=40
5*15=75
6*8=48
7*5=35
8*1=8

avg marks= 235/50= 4.7

Like? Yes (1) | No   

PRASHANT KUMAR   9 years AGO

(2*4+3*7+4*10.....7*5+1*8)/50

Like? Yes (1) | No   

Sure Mamatha   9 years AGO

( (2*4)+(3*7)+(4*10)+(5*15)+(6*8)+(7*5)+(8*1) ) / ( 4+7+10+15+8+5+1 )

= 4.7

Like? Yes (1) | No   

Sumit Agarwal   9 years AGO

Multiply all marks with no. of students and divide by total no. of students
Total marks 235
Total students 50
Average marks 4.7

Like? Yes (1) | No   

VINOD KUMAR REDDY   9 years AGO

average=sum of products of marks and no. of students/total no. of students

Like? Yes (1) | No   

Soma Naresh   9 years AGO

2*4 + 3*7 + 4*10 +5*15 + 6*8 + 7*5 + 8*1 = 235
total no. of students = 4+7+10+15+8+5+1 = 50
avg= 235/50= 4.7

Like? Yes (1) | No   

Ayush Maheshwari   9 years AGO

total marks obtained = 2*4+3*7+4*10+5*15+6*8+7*5+8*1
= 235
total no of students = 50

average marks of class = 235/50

Like? Yes (1) | No   

04 May 2015 Sequence

What is the next number of the following sequence
6, 9, 13.5, 20.25, 30.375, .....

OPtion

1) 45.5625
2) 45.5
3) 45.56
4) 45.6552
5) 47.5625
6) 46.25
7) 45.5225
8) 45.7575
9) 47.5
10)45

Solution

6
(6/2)+6 = 9
(9/2)+9 = 13.5
(13.5/2)+13.5 = 20.25
(20.25/2)+20.25 = 30.375
Similarly
(30.375/2)+30.375 = 45.5625

second method
t(r) = ar^(n-1)
where a = 6 n = 6 and r = 9/6 = 1.5
now solve

Option 1)

Correct Option: 1 Best Solution (64)

Supriya Mondal   9 years AGO

Here,we can get next term by multiplying 1.5 to the previous term.
6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.5625
So, option 1)45.5625 is the right answer

Like? Yes (8) | No   

shaik sharina   9 years AGO

6+6/2=9
9+9/2=13.5
13.5+13.5/2=20.25
20.25+20.25/2=30.375
30.375+30.375/2=45.5625

Like? Yes (4) | No   

bhavya   9 years AGO

6+(6/2)=9
9+(9/2)=13.5
13.5+(13.5/2)=20.25
20.25+(20.25/2)=30.375
30.375+(30.375/2)=45.5625

Like? Yes (4) | No   

Adesh   9 years AGO

Here ans. is 45.5625
bcz in sequence.....

nth no. = [(n-1)th no.] + [(n-2)th no.] - [1.5^(n-2)].
As,


1st no. = (6)
2nd no. = (9)
3rd no. = (6)+(9)-(1.5^1)=13.5
4th no. = (9)+(13.5)-(1.5^2)=20.25
5th no. = (13.5)+(20.25)-(1.5^3)=30.375

and the 6th no. is...
(20.25)+(30.375)-(1.5^4) = 45.5625.

Hence (1) i.e., 45.5625 is correct.

Like? Yes (4) | No   

moumita   9 years AGO

6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.5625

Like? Yes (5) | No (2)  

b.subbarao   9 years AGO

6
6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.565 so option 1 is correct

Like? Yes (3) | No   

Ravi Kumar Kodari   9 years AGO

30.375*1.5=45.5625 ans.

Like? Yes (3) | No   

sai charan   9 years AGO

(6+9)-9/6=13.5,
(13.5+9)-13.5/6=20.25
(20.25+13.5)-20.25/6=30.375
(30.375+20.25)-30.375/6=45.5625

Like? Yes (2) | No   

~Sandeep~   9 years AGO

nth team = (n-1) term * 1.5
Hence 6th Term = 5th Term * 1.5 = 30.375 * 1.5 = 45.5625

Like? Yes (4) | No (2)  

SUSHANT KUMAR   9 years AGO

6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.5625

Like? Yes (2) | No   

aman aditya   9 years AGO

6+ 6/2
=>6+3=9
9+4.5=13.5
30.375+15.1875=45.5625

Like? Yes (2) | No   

hari   9 years AGO

Next number = 1.5 * prev_number

Like? Yes (3) | No (1)  

Jay parmar   9 years AGO

first number*1.5= second number

Like? Yes (2) | No   

SAGNIK DATTA   9 years AGO

each term is 1.5*previous term
so 30.375*1.5=45.5625

Like? Yes (2) | No   

Prateek Rai   9 years AGO

30.375/2+30.375=45.5625

Like? Yes (3) | No (1)  

Aditi Tenguria   9 years AGO

9/6=3/2
13.5/9=3/2
.....
45.5625/30.375=3/2

Like? Yes (2) | No   

kranthi kanchanapally   9 years AGO

6*1.5=9
9*1.5=13.5
13.5*1.5=20.5
20.5*1.5=30.375
30.375*1.5=45.5625
so option 1 is correct

Like? Yes (2) | No   

sravani   9 years AGO

9-6=3
13.5-9=4.5=3+3/2
similarly
13.5+(4.5+4.5/2)=20.25
20.25+(6.75+6.75/2)=30.375
30.375+(10.125+10.125/2)=45.5625

Like? Yes (2) | No   

ABHINAV PUSHPAM   9 years AGO

Each number is divided by 2 and added to that number itself.
So option 1)

Like? Yes (2) | No   

Sundar Kumar   9 years AGO

4*1.5=6,
6*1.5=9,
9*1.5=13.5,
13.5*1.5=20.25 ,
20.25 *1.5 =30.375,
hence it will give 30.375*1.5=45.5625
Answer: Option: 1)45.5625

Like? Yes (2) | No   

Pranati Kundu   9 years AGO

let x be the next number
x/30.375=1.5
as the common ratio is 1.5
x=45.5625

Like? Yes (2) | No   

umesh   9 years AGO

the sequence is in form
6,6*3/2,9*3/2,13.5*3/2,20.25*3/2,30.375*3/2
45.5625 ans..

Like? Yes (2) | No   

Rahul Das   9 years AGO

20.5=6+(6+9+13.5)/2
30.375=6+(6+9+13.5+20.5)/2
45.5625=6+(6+9+13.5+20.5+30.375)/2
a
so answer is option 1

Like? Yes (2) | No   

Bholanath    9 years AGO

6+6/2 = 9
9+9/2 =13.5
13.5 + 13.5/2 = 20.25
20.25+20.25/2 = 30.375
30.375 +30.375/2 = 45.5625 Ans.

Like? Yes (2) | No   

kundan kumar   9 years AGO

ist no+3=2nd no+3*1.5=3rd no +3*1.5*1.5=4th no+3*1.5*1.5*1.5=5th no+3*1.5*1.5*1.5*1.5=6th no

Like? Yes (2) | No   

A.P.Singh   9 years AGO

Next term is obtained by multiplying previous term by 1.5.

Like? Yes (2) | No   

Dr.Dipin Singh   9 years AGO

nth term is obtained by following formula:-
Tn = 4*(1.5)^n
T1=6
T2= 4*2.25=9
.. so on

Like? Yes (2) | No   

neha gupta   9 years AGO

the given series can be written as
6,9,27/2,81/4,243/8,
so next term is 729/16=45.5625

Like? Yes (2) | No   

aarav   9 years AGO

13.5/6=2.2 2.2*9=20.25 20.25/6=3.375 3.375*9=30.375 30.375/6=5.0625 9*5.0625=45.5625...
Hence we have our answer that is option 1

Like? Yes (2) | No   

sumit bansode   9 years AGO

at each step next no is 1.5 times of previous no

Like? Yes (2) | No   

ADERU CHENCHU NITHISH   9 years AGO

given sequence is in g.p
so common ratio r=1.5
sixth term=a*r^(n-1)=6*1.5^(5)=45.5625

Like? Yes (2) | No   

Subrata Sadhukhan   9 years AGO

here next number is add the previous no and half of the number.
let 9+4.5=13.5
so
30.375+15.1875=45.5625

Like? Yes (2) | No   

rajkumar   9 years AGO

6
6/2=3; 3+6=9
9/2=4.5; 4.5+9=13.5
13.5/2=6.75; 6.75+13.5=20.25
20.25/2=10.125; 10.125+20.25=30.375
30.375/2=12.1875; 15.1875+30.375=45.5625

Like? Yes (2) | No   

praveen kumar   9 years AGO

20*2.25=45.5625

Like? Yes (2) | No   

ANANTHI.P   9 years AGO

6/2=3(6+3=9)
9/2=4.5(9+4.5=13.5)
13.5/2=6.75(13.5+6.75=20.25)
20.25/2=10.125(20.25+10.125=30.375)
30.375/2=15.1875(30.375+15.1875=45.5625)

Like? Yes (2) | No   

Neeraja Aruva   9 years AGO

6,
6+half of 6=6+3=9,
9+half of 9=9+4.5=13.5,
13.5+half of 13.5=13.5+6.75=20.25
20.25+half of 20.25=20.25+10.125=30.375
30.375+half of 30.375=30.375+15.1875=45.5625

Like? Yes (2) | No   

MANNISH   9 years AGO

30.375/2 +30.375

Like? Yes (2) | No   

Meenakshi   9 years AGO

Every term is of the form x+0.5*x
6+0.5*6=9
9+0.5*9=13.5
so similarly
30.375+0.5*30.375=45.5625
option 1)

Like? Yes (2) | No   

Yathiraj   9 years AGO

next number is 1.5 times the previous number.

Like? Yes (2) | No   

sathish    9 years AGO

6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.5625

Like? Yes (2) | No   

Josepheena Joseph   9 years AGO

6+(6/2) = 9
9+(9/2) = 13.5
13.5+(13.5/2) = 20.25
20.25+(20.25/2) = 30.375
30.375+(30.375/2) = 45.5625

Like? Yes (2) | No   

vibhu raj gupta   9 years AGO

multiply with 1.5 to get next term
and multiply 30.375*1.5=45.5625

Like? Yes (2) | No   

M.Ranjith Kumar    9 years AGO

Dif between all no 1.5 so 30.375x1.5=45.5625

Like? Yes (2) | No   

PAWAN KUMAR   9 years AGO

Next no = prev no *1.5

Like? Yes (2) | No   

NITHYA   9 years AGO

6+(6/2) +( 9+9/2) +....

Like? Yes (2) | No   

sompon temtheerakij   9 years AGO

6/2+6 = 9
9/2+9 = 13.5
13.5/2+13.5 = 20.25
20.25/2+20.25 = 30.375
30.375/2+30.375 = 45.5625

Like? Yes (2) | No   

jaganmohan rao .pola   9 years AGO

45.5625

Like? Yes (2) | No   

Bhavya Goyal   9 years AGO

9 = 6 + 1/2*(6)
13.5 = 9 + 1/2*(9)
20.5 = 13.5 + 1/2 *(13.5)
30.375 = 20.25 + 1/2 * (20.25)

next value will be : 30.375 + 1/2(30.375) = 45.5625

Like? Yes (2) | No   

sai   9 years AGO

30.375/2 + 30.375

Like? Yes (2) | No   

vamsy   9 years AGO

6*1.5=9
9*1.5=13.5
13.5*15=20.25
30.375*1.5=45.5625

Like? Yes (2) | No   

sravya   9 years AGO

the sequence is followed by multiplying the numbers with 1.5
6*1.5=9,9*1.5=13.5 and so on 30.375*1.5=45.5625

Like? Yes (2) | No   

santosh kumar   9 years AGO

The pattern is the number + 1/2 the number = the next number.

30.375*(1/2)= 15.1875

30.375+15.1875= 45.5625

Like? Yes (2) | No   

Abhishek Ranjan   9 years AGO

6+(9-6)×1.5=13.5
13.5+(13.5-9)×1.5=20.25
20.25+(20.25-13.5)=30.375
30.375+(30.375-20.25)×1.5=45.5625

Like? Yes (2) | No   

Devendra Marghade   9 years AGO

6*1.5=9
9*1.5=13.5
13.5*1.5=20.25
20.25*1.5=30.375
30.375*1.5=45.5625
So answer is option 1)

Like? Yes (2) | No   

siddharth prakash singh   9 years AGO

6 +[6/2] =9
9+[9/2]=13.5
13.5+[13.5/2]=20.25
20.25+[20.25/2]=30.375
30.375+[30.375/2]=45.5625

Like? Yes (2) | No   

DEBAYAN BASU   9 years AGO

All the numbera are increasing by multiplying with 1.5!

Like? Yes (2) | No   

Madhumoy Gope   9 years AGO

30.375*1.5=45.5625

Like? Yes (2) | No   

penchalaiah63@gmail.com   9 years AGO

6... half...3
6+3=9...half....4.5
9+4.513.5 .... its half is .... 6.75
13.5+6.75=20.25 .... its half is ....10.125
20.25+10.125=30.375 .... its half is ....15.1875
30.375+15.1875=45.5625

Like? Yes (2) | No   

Math Lovers   9 years AGO

next number is 1.5 times of previous number .
so answer = 30.375*1.5 = 45.5625

Like? Yes (2) | No   

Rahul Verma   9 years AGO

evry nxt term is the product of preeceding term and 1.5
e.g. 6* 1.5 =9
9* 1.5= 13.5
likewise 30.375 * 1.5 = 45.5625

Like? Yes (2) | No   

dola   9 years AGO

each number difference is multiplied by 1.5.

Like? Yes (2) | No   

MRITUNJAY   9 years AGO

next number is difference between number and divide by 2 in each term
10.125+10.125/2=15.1875
next term is=15.1875+30.375=45.5625

Like? Yes (2) | No   

kishore   9 years AGO

9-6 =3
3+ 3/2 = 4.5 = 9 + 4.5 = 13.5
previous number + diffb/w previous numbers + diff / 2

Like? Yes (3) | No (2)  

rakesh singh   9 years AGO

9+6=15*9=135shifted by 1 decimal place i.e13.5
13.5+9=22 .5*9=202.5,shifted by 2 decimal place i.e20.25
20.25+13.5=33.75*9=303 .75,shifted by 3 decimal placei.e30.375
20.25+30.375=50.625*9=455.625,shifted by 4 decimal place,i.e 45.5625

Like? Yes (1) | No   

01 May 2015 Five digit number

A five digit number has all non-zero different digits & decreasing arranged. Average of all the digits of the numbers is 5. The difference of number and the number formed by reversing the order of digits is 84942. Sum of all such possible digits are

OPtion

1) 196052
2) 196002
3) 195984
4) 195842
5) 195802
6) 195798
7) 195602
8) 195588
9) 195512
10)195490

Solution

Let number is 10000x+1000y+100z+10a+b
Where x not= y not= z not= a not= b not= 0
On reversing digits, we get the new number
10000b + 1000a + 100z + 10y + x
Difference
9999x + 990y - 990a - 999b
= 9999(x-b) + 990(y-a) = 84942
only possible case x-b = 8
so y-a = 5
if x-b = 8
x = 9, b = 1 (Only possibility)
and y-a = 5
(y,a)
(8,3) and (7,2)
So two possible case
x=9 y=8 z=? a=3 b=1 ---------(1)
and x=9 y=7 z=? a=2 b=1 -----(2)
Since average of digit = 45
so z=4 in (1) and z=6 in (2)
So number are
98431
97621
Sum = 196052

Option 1)

Correct Option: 1 Best Solution (17)

Supriya Mondal   9 years AGO

Two numbers are possible. They are 98431 and 97621
So, sum of this two number is=98431+97621=196052
So, option 1)196052 is the right answer

Like? Yes (14) | No (4)  

siva naga kumar   9 years AGO

Let the no. be abcde where a>b>c>d>e
Given = a b c d e = 25
and a b c d e
-e d c b a

8 4 9 4 2
Solve it using cryptographic techniques
1st digit a-e=8,, so take a=9 and e=1
using this d-1 10-b=4 { second last digit }
d 5=b
now take d=2 , b=7 or d=3 , b=8
putting all the values and c a random we get
a= 9 a=9
b= 7 b=8
c= c=
d= 2 d=3
e=1 e=1
Now using given condition a b c d e=25;;
c=6 c=4
Hence nos are 97621 and 98431 and no other case satisfies the conditions in the question ,
97621 98431is equal to
196052

Like? Yes (3) | No   

Madhumoy Gope   9 years AGO

Suppose the no is abcde,such that a>b>c>d>e>0
Now, (a+b+c+d+e)/5=5
Or, a+b+c+d+e=25
By the given condition of (abcde-edcba=84942) if we derive we will get-
9999(a-e) +990(b-d)=84942
Or,1111(a-e)+110(b-d)=9438
From this we will get,a=9,b=(8,7),c=(4,6),d=(3,2),e=1
So,
The possible nos are 98431 & 97621
So,the sum of these 2 nos is 196052

Like? Yes (3) | No   

Aditi Tenguria   9 years AGO

Let the no. be abcde where a>b>c>d>e
Given = a+b+c+d+e = 25
and a b c d e
-e d c b a
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
8 4 9 4 2
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Solve it using cryptographic techniques
1st digit a-e=8,, so take a=9 and e=1
using this d-1+10-b=4 { second last digit }
d+5=b
now take d=2 , b=7 or d=3 , b=8
putting all the values and c a random we get
a= 9 a=9
b= 7 b=8
c= c=
d= 2 d=3
e=1 e=1
Now using given condition a+b+c+d+e=25;;
c=6 c=4
Hence nos are 97621 and 98431 and no other case satisfies the conditions in the question ,
Hence sum = 97621
+98431
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
196052

Like? Yes (3) | No   

Bholanath    9 years AGO

Given points :
1. Average of 5 digits nos. = 5 means sum of digits should be 25
2. Number should be in decreasing order, non- zero and different
3. Difference of Number and reverse of Number = 84942

Overall conclusion:
1. Number must be start with 9 so, the number will be 98521, 98431, 97621, 97531, 96541, 96532
(whose sum is 25)
2. Only the numbers 98431-13489 = 84942, and 97621-12679 = 84942

so, the sum of numbers = 98431+97621= 196052 Ans.

Like? Yes (3) | No (1)  

ankit kamboj   9 years AGO

Let the no. be abcde where a>b>c>d>e
Given = a+b+c+d+e = 25
and a b c d e
-e d c b a
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
8 4 9 4 2
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Solve it using cryptographic techniques
1st digi

Like? Yes (3) | No (1)  

kranthi kanchanapally   9 years AGO

The possible numbers are 97621 and 98431
97621-12679=84942
98431-13489=84942
then the sum of the possible numbers is=97621+98431=196052

Like? Yes (1) | No   

vamsy   9 years AGO

97621-12679=84942
&
98431-13489=84942
Then 97621+98431=196052

Like? Yes (1) | No   

sourav pal   9 years AGO

Let the no. be abcde where a>b>c>d>e
Given = a+b+c+d+e = 25
and a b c d e
-e d c b a
-----------------------
8 4 9 4 2
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Solve it using cryptographic techniques
1st digit a-e=8,, so take a=9 and e=1
using this d-1+10-b=4 { second last digit }
d+5=b
now take d=2 , b=7 or d=3 , b=8
putting all the values and c a random we get
a= 9 a=9
b= 7 b=8
c= c=
d= 2 d=3
e=1 e=1
Now using given condition a+b+c+d+e=25.
c=6 c=4
Hence nos are 97621 and 98431 and no other case satisfies the conditions in the question ,
Hence sum = 97621
+98431
------------------------------
196052

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

numbers are=98431 and 97621
difference between number and reverse is 98431-13489=84942
similarly by 2nd number=97621-12679=84942
sum of both the number is=98431+97621=196052

Like? Yes (2) | No (2)  

umesh   9 years AGO

two such possible no..
are 98431,97621 if we go through the question
sum will be 196052

Like? Yes (1) | No (1)  

~Sandeep~   9 years AGO

98431 13489 84942
97621 12679 84942

Sum of 98431 +97621 = 196052

Like? Yes (1) | No (1)  

SAGNIK DATTA   9 years AGO

Two possible numbers are : 98431 and 97621 which on reversing and subtracting gives 84982 so sum is 196052

Like? Yes (1) | No (1)  

Surya Rajitha   9 years AGO

average of the digits in the number 98431 is (9+8+4+3+1)/5=5

98431-13489=84942

now another possibility is 97621

and their average is also 5 and 97621-12679=84942

sum= 98431+97621=196052

that is option 1

Like? Yes (1) | No (2)  

praveen kumar   9 years AGO

ans 1 is coorect
98432 and 97621 are two possible no

Like? Yes (1) | No (2)  

Surit Datta   9 years AGO

two possible numbers are
97621 and 98431

Like? Yes (1) | No (2)  

neha gupta   9 years AGO

such possible numbers can be only two .They are 97621 and 98431.
Explanation:
as the difference between the number and reverse number is 84942. Therefore first and last digits can be 9 and 1.
Second and fourth digit must have a difference of 5 to obtain the required difference this can be achieved by only two combinations 2 and 7, 3 and 8. therefore numbers are
97621+98431=196052

Like? Yes (1) | No (2)  

30 Apr 2015 Probability

A student gets 450 marks out of 500 in an exam having subject Hindi, Mathematics, Physics, Chemistry and English. For qualifying an exam of science his score should be 90% in 3 subjects Physics, Chemistry and Mathematics. Probability to get his success in that exam will be.

OPtion

1) 1/5
2) 2/5
3) 3/5
4) 4/5
5) 1/3
6) 2/3
7) 1/4
8) 3/4
9) 1/2
10)1

Solution

Number of combinations for Physics, Chemistry and Mathematics are
(5*4*3*2*1)/(3*2*1*2*1) = 10
Out of 10 combinations non-qualifying combination are
(82,85,93), (82,85,94), (82,85,96) and (82,93,94)
So possibility to get his success = 6/10
=3/5

Option 3)

Correct Option: 3 Best Solution (7)

SAGNIK DATTA   9 years AGO

if marks in each subject be 500 then he gets 450 and 90% in 3 subjects is 270 so probability is 270/450 = 3/5

Like? Yes (5) | No (4)  

vinod kumar   9 years AGO

total percentage =90%
total subjects=5
required subject for success=3
probability=3/5

Like? Yes (3) | No (4)  

Anubhav jain   9 years AGO

total no. of subjects=5
Preferable Subjects is 3
Prob.=3/5

Like? Yes (2) | No (3)  

Srinivas   9 years AGO

3 subjects should get more than 90

Like? Yes (2) | No (4)  

NESAB JAFAR   9 years AGO

number os favourable condition is 3
total conditin is 5
probablity
3/5

Like? Yes (2) | No (4)  

NIVA THEKDI   9 years AGO

the sum require for qwalifying an exam is 270. which can be done in 3 ways out of 5.

Like? Yes (1) | No (4)  

Aditi Tenguria   9 years AGO

let total marks in physics,maths and chemistry=x
x/300 = 90/100 => x= 270
probability=270/450 =3/5

Like? Yes (1) | No (5)  

29 Apr 2015 Time and Distance

A man can swim 3 kmph in still water. If the velocity of the stream be 2 kmph, the time taken by him to swim to a place 10 km upstream and back, is

OPtion

1) 25/3 hrs
2) 46/5 hrs
3) 10 hrs
4) 12 hrs
5) 36/7 hrs
6) 23/4 hrs
7) 11 hrs
8) 13 hrs
9) 15 hrs
10)18 hrs

Solution

Rate upstream = 1 kmph, Rate downstream = 5 kmph
Therefore Total time taken = 10/1 + 10/5 = 12 hrs

Correct Option: 4 Best Solution (50)

Supriya Mondal   9 years AGO

Relative speed in upstream is=3-2=1km/hr
and relative speed in downstream is=3+2=5km/hr
So, time taken to complete 10km in upstream is=10/1=10hr
and time taken to complete 10km in downstream is=10/5=2hr
So, total time taken=10+2=12hr
So, option 4)12hr is the right answer

Like? Yes (14) | No   

SUSHANT KUMAR   9 years AGO

TIME TAKEN TO SWIM ALONG WITH STREAM = 10/(3+2)=2HRS
TIME TAKEN TO SWIN AGAINST THE STREAM=10/(3-2)=10 HRS
SO TOTAL TIME TAKEN=10+2=12HRS.

Like? Yes (6) | No   

Prateek Dalakoti   9 years AGO

As on still water his speed is 3km/h
speed of stream is 2km/h.

while going upstream speed of man will be (3-2)km/h=1km/h
so time to travel 10km = 10hrs

and while going downstream speed of man will be 3+2=5km/h

so time to travel 10km downstream = 10/5= 2hrs

So total time = 10hrs + 2hrs = 12 hrs

Like? Yes (5) | No   

Devendra Marghade   9 years AGO

Upstream speed=3-2=1 Kmph.
Downstream speed=3+2=5 Kmph.
Total time taken to cover 10 Km. upstream & 10 Km. downstream=(10/1) + (10/5) =12 hrs.
So answer=Option (4)

Like? Yes (3) | No   

RAKESH   9 years AGO

10/(3-2) + 10/(3+2) = 12hrs

Like? Yes (2) | No   

Anuradha   9 years AGO

speed upstream =speed of man-speed of stream=3-2=1
speed downstream =speed of man+speed of stream=3+2=5

speed=distance/time
time taken to go upstream=distance/speed=10/1=10hr
time taken to go downstream=distance/speed=10/5=2hr

totaltime=10+2=12hr

Like? Yes (2) | No   

siddharth prakash singh   9 years AGO

still water speed = 3 kmph
velocity of the stream = 2 kmph
upstream velocity=(3-1)= 1kmph
downstream velocity= (3+2)= 5kmph
so time taken to cover 10 km upstream and downstream= (10/1) +(10/5)=10+2 =12hrs

Like? Yes (2) | No   

Harsh Poddar   9 years AGO

time taken for 10 km upstream=10/(3-2)=10hrs
time taken for 10 km downstream=10/(3+2)=2 hrs
total time taken=10+2=12 hrs

Like? Yes (1) | No   

kranthi kanchanapally   9 years AGO

time taken to cover upstream 10km is 10/(3-2)=>10

time taken to cover downstream 10km is 10/(3+2)=>2

time taken to cover upstream 10km and downstream 10km is 10+2=>12hrs

Like? Yes (1) | No   

prabhat kumar   9 years AGO

up 10/5=2
down 10/1=10
tot=12hr

Like? Yes (1) | No   

umesh   9 years AGO

speed in downstream is 3-2=1kmph
speed in upstream is 3+2=5kmph
t=10/1+10/5
12hr..ans.

Like? Yes (1) | No   

Surit Datta   9 years AGO

according to the question,
10/(3 + 2) + 10/(3 - 2) = 12hours
so option 4
that's it.

Like? Yes (1) | No   

Jaspalsingh Parmar   9 years AGO

t1= 10/(3+2) = 2
t2= 10/(3-2) = 10
total time= 12 hrs

Like? Yes (1) | No   

Jay parmar   9 years AGO

total time = 12 hrs

Like? Yes (1) | No   

Subrata Sadhukhan   9 years AGO

total distance=(10+10)=20km.
at the upstream his velocity=(3+2)=5km
time taken to reach the end of 10 km is 2h
and when he back his velocity=(3-2)=1km.
time taken to back to his starting point(means he cover 10km distance)= 10h
so the total time is=(10+2)=12h

Like? Yes (1) | No   

ABHINAV PUSHPAM   9 years AGO

Answer is 12 hrs

Like? Yes (1) | No   

neha gupta   9 years AGO

Net Upstream speed is (3-2)=1km/hr
Net Downstream speed is (3+2)=5km/hr
one side distance is 10km
Therefore Upstream time=10/1=10hrs
Downstream time=10/5=2hrs
Total time=10+2=12hrs
Thus 12hrs is the answer.

Like? Yes (1) | No   

sravani   9 years AGO

10/3-2 + 10/3+2 =12 Hrs..

Like? Yes (1) | No   

Srinivas   9 years AGO

10/(3+2) + 10/(3-2)
=12

Like? Yes (1) | No   

Neeraja Aruva   9 years AGO

D=10km , Downstream speed =3+2=5km/hr,Upstremspeed = 3-2=1km/hr
time = D/S
T= D/Downstream speed +D/Upstream speed
= 10/5 +10/1
2+10=12hrs

Like? Yes (1) | No   

sompon temtheerakij   9 years AGO

upstream , velocity = 3-2 = 1 km/h
10 km = 10 hrs.
back , velocity = 2+3 = 5 km/hr
10 km = 2 hrs
total = 10+2 = 12 hrs

Like? Yes (1) | No   

kishore   9 years AGO

for upstream = 3-2 = 1kmph for 10 km = 10 hours will take
and for coming back downstream = 3+2 = 5kmph for 10 km it will take 2hours
so total 12 hours

Like? Yes (1) | No   

MD JAVED SALIM   9 years AGO

(10/5)+(10/1)=12

Like? Yes (1) | No   

Gourav Rajdhar   9 years AGO

Time taken for upstream
3km/h + 2km/h = 5km/h
Time = Distance/Speed
Time = 10/5
Time = 2hrs (time taken for upstream)
Time taken for back stream

Like? Yes (1) | No   

PAWAN KUMAR   9 years AGO

Time upstream = 10/(3-2) = 10 Hrs
Time downstream = 10/(3+2) = 2 Hrs
So, Total time = 10+2 = 12 Hrs.

Like? Yes (1) | No   

charu goyal   9 years AGO

upstream-10hr
downstream-2hr
total time-12hr

Like? Yes (1) | No   

Niraj   9 years AGO

Speed of upstream = (3-2)km/hr = 1 km/hr
Speed of downstream (3+2) km/hr = 5 km/hr
Total time taken = (10/1+10/5) hrs = 12 hrs

Like? Yes (1) | No   

aman aditya   9 years AGO

for going upstream 10/(3-2)=10 hr
for down stream 10/(3+2)= 2 hr
total=10+2=12 hr

Like? Yes (1) | No   

Abhishek Ranjan   9 years AGO

upstream time = 10/(3+2)=2hrs
downstream time= 10/(3-2)=10hrs
total time= 12hrs

Like? Yes (1) | No   

jaganmohan rao .pola   9 years AGO

10/(3-2) + 10/(3+2) = 12hours

Like? Yes (1) | No   

Aditi Tenguria   9 years AGO

upstream = 3-2 =1 kmph
downstream =3+2 =5 kmph
time taken to cover upstream =10/1=10hr
time taken to cover downstream =10/5=2hr
total time = 10+2 =12 hr

Like? Yes (1) | No   

praveen kumar   9 years AGO

ans 4 is correct

Like? Yes (1) | No   

Ritu Priya   9 years AGO

speed during upstream=1 kmph
speed during downstream=5 kmph
time to cover 10 km upstream= distance/speed = 10/1=10hr
time to cover 10 km downstream= distance/speed = 10/5=2hr
total time = 12 hrs.

Like? Yes (1) | No   

Madhumoy Gope   9 years AGO

(10/(3-2))+(10/(3+2))=10+2=12 hours

Like? Yes (2) | No (1)  

ankit kamboj   9 years AGO

B=velocity of boat=3km/hr ;;;; R=velocity of river=2km/hr ;;;;;;
U=upstream velocity=B-R=1km/hr ;;;;;;; D=downstream velocity=B+R=5km/hr ;;;;;;;;;
Speed=Distance/Time ;;;;;;;;;;;
Time=Distance/speed ;;;;;;;;;;
Given distance =10km
Total time= time upstream +time downstream
= 10/1 + 10/5
= 10 + 2
==== 12 hrs

Like? Yes (1) | No   

Apurva chowksey   9 years AGO

3-2=1...10hrs....3+2=5...2hrs.....ans=12hrs

Like? Yes (1) | No   

jalaj   9 years AGO

Time taken to go upstream and back is =d/t=10/3-2+10/3+2=12
upstream speed=speed in still water - speed in upstream=3-2
downstream speed(while going back) speed in still water+ speed in downstream=3+2

Like? Yes (2) | No (1)  

Vinod Kumawat   9 years AGO

upstream 3+2=5kmph
downstream 3-2=1kmph

Like? Yes (1) | No   

Pranati Kundu   9 years AGO

time taken for upstream =10/5=2hr
time taken for downstream =10/1=10hr
total time taken =12hr

Like? Yes (1) | No   

vivek   9 years AGO

speed of boat in upstream=3-2=1km/hr and in downstream=3+2=5km/hr
total time taken = (10/1)+(10/5)= 12 hr

Like? Yes (1) | No   

M.Ranjith Kumar    9 years AGO

in against streamhe will swim 1 kmph so hewill take 10 hrs,and with stream he will swim 5 kmph so he will take 2 hrs so totally 12 hrs

Like? Yes (1) | No   

SANDIPAN BANERJEE   9 years AGO

upstream:
Speed=3-2=1km/hr
D=10km
So Time=10/1=10hrs

downstream:
Speed=3+2=5km/hr
D=10km
So Time=10/5=2hrs

Therefore, Total time taken=10+2=12hrs

Like? Yes (1) | No   

suraj nath prasad   9 years AGO

for upstream speed will be 3-2 & for dowmstream speed will be 5

Like? Yes (1) | No   

deep   9 years AGO

man u stream v
downwards=u+v=5
upwrds=u-v=1
t=10/5 down
t=10/1 upwrds
t down + t up= 12

Like? Yes (1) | No   

Arnab Majumder   9 years AGO

in case of up stream total velocity=3+2 kmph
so, time=10/5=2hrs
in case of back total velocity=3-2kmph
time=10/1=10hrs
10+2=12hrs

Like? Yes (1) | No   

Udhaya kumar   9 years AGO

{10 / (3-2)}+{10 / (3+2)} = 12...........

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

upstream speed=3-2=1kmph
downstream speed=3+2=5kmph

time=10/1+10/5=12 hrs

Like? Yes (2) | No (1)  

bhishma   9 years AGO

upstream 3+2=5kmph
downstream= 3-2=1kmph
time=2+10=12h

Like? Yes (1) | No   

shaik sharina   9 years AGO

upstream speed=3-2=1kmph
downstream speed=3+2=5kmph
time taken =(10/1)+(10/5)=12kmph

Like? Yes (1) | No   

SAGNIK DATTA   9 years AGO

time taken for upstream = 10/(3-2)
time taken for downstream=10/(3+2)
so total = 12

Like? Yes (1) | No (1)  

28 Apr 2015 Sum of x and y

4, 16, 7, 49, 13, 169, x, y
Sum of x and y will be

OPtion

1) 250
2) 264
3) 272
4) 281
5) 285
6) 290
7) 292
8) 296
9) 299
10)300

Solution

4, 4^2 = 16, Then next is 1+6 = 7
Now repeat
7, 7^2 = 49, Then next is 4+9 = 13
Now repeat
13, 13^2 = 169, Then next is 1+6+9 = 16
Now repeat
16, 16^2 = 256
Sum = 16+256 = 272

Option 3)

Correct Option: 3 Best Solution (59)

Surit Datta   9 years AGO

4^2 = 16
6 + 1 = 7
7^2 = 49
4+9 = 13
13^2 = 169
1+6+9 = 16
16^2 = 256
so,
256 + 16 = 272
so option 3
that's it.

Like? Yes (6) | No (3)  

Supriya Mondal   9 years AGO

Here first number is 4
and second number is square of first number, i.e 4*4=16
third number is sum of the digits of second number, i.e 1+6=7
like that, forth number is=7*7=49
and fifth number is=4+9=13
sixth number is 13*13=169
So, x will be=1+6+9=16
and y will be=16*16=256
So, sum of x and y will be 16+256=272
So, option 3)272 is the right answer

Like? Yes (4) | No (3)  

sompon temtheerakij   9 years AGO

4^2 = 16
1+6 = 7
7^2 = 49
4+9 = 13
13^2 = 169
1+6+9 = 16
16^ = 256
16+256 = 272

Like? Yes (1) | No   

Vaibhav Srivastava   9 years AGO

4^2 = 16
1+6 = 7
7^2 = 49
4+9 = 13
13^2 = 169
1+6+9 = 16 = x
16^2 = 256 = y
x+y = 16+256 = 272

Like? Yes (2) | No (1)  

kiran kumar   9 years AGO

4,4*4,7,7*7,13,13*13,
by option verification
16,16*16=272

Like? Yes (1) | No   

Raman   9 years AGO

4, 16, 7, 49, 13, 169, x, y
4, 16, 7( 6+1), 49(7^2), 13(4+9), 169(13^2), 16(1+6+9), 256 (16^2)
x+y=16+256=272

Like? Yes (2) | No (1)  

Ch. Anusha Kumari   9 years AGO

x=16;y=16*16=256
sum of x+y=16+256=272.

Like? Yes (1) | No   

priyanka    9 years AGO

x=1+6+9=16
y=16^2=256
x+y=272

Like? Yes (1) | No   

praveen kumar   9 years AGO

3 is rt ans

Like? Yes (1) | No   

sonu singh   9 years AGO

4*4=16 and 1+6=7 and 7 square is 49 and 4+9=13 and sqr r 169 then answer is 1+6+9=16 and it sqr is 256 +16=272 ans

Like? Yes (1) | No   

Neeraja Aruva   9 years AGO

4,4*4=16
4+3=7,7*7=49
7+6=13,13*13=169
13+3=16,16*16=256
256+16=272

Like? Yes (1) | No   

SUSHANT KUMAR   9 years AGO

4, 16, 7, 49, 13, 169, x, y
4, 4^2
4+3, 7^2
7+6, 13^2
13+3, 16^2
16+256=272 ANS.

Like? Yes (1) | No   

s.durgadevi   9 years AGO

4*4=16
1+6=7
7*7=49
4+9=13
13*13=169
1+6+9=16
16*16=256
x=16,y=256
x+y=272

Like? Yes (2) | No (1)  

Subrata Sadhukhan   9 years AGO

16*16+16=272

Like? Yes (1) | No   

Madhumoy Gope   9 years AGO

Given: 4,4^2,7,7^2,13,13^2,x,y
Then the value of y must be x^2
Now, x+y=x+x^2=16+16^2=272. (putting values one by one starting from14)
So,option 3 is correct

Like? Yes (1) | No   

surya    9 years AGO

1+6+9=16
x=16
y=16*16=256
256+16=272

Like? Yes (1) | No   

nishi   9 years AGO

the series is like 4,16,7,49,169,x,y
as we can see that the odd terms are the square roots of the next even terms ..so as the series goes we need to find x+y
which is x+x*x
which is satisfied by the option 3 only

Like? Yes (1) | No   

suresh kumar kadavakollu   9 years AGO

4^2=16----->1+6=7
7^2=49------>4+9=13
13^2=169---->1+6+9=16
16^2=256
so X is 16 and Y is 256
X+Y=256+16=272

Like? Yes (1) | No   

kranthi kanchanapally   9 years AGO

4*4=16 next 1+6=7
then 7*7=49 next 4+9=13
then 13*13=169 next 1+6+9=16
so 16*16=256
then x=16 and y=256
sum of x and y is=272 is the right answer

Like? Yes (1) | No   

jalaj   9 years AGO

16,256 becoz
see 4,16,7
3rd nummber is always sum of unit and tens digit of 16(6+1)
2 nd number is square of first number.

Like? Yes (1) | No   

Deepika Maheshwari   9 years AGO

the next nmbr will be sum of prev. nmbr
x=16 will be the nxt nmber
n observing the series square of 16 that is y=256
256+16=272

Like? Yes (1) | No   

Gaurav Goel   9 years AGO

13+3=16 nd 16*16=256
16+256=272

Like? Yes (1) | No   

gulshan kumar   9 years AGO

4*4=16
6+1=7
7*7=49
9+4=13
13*13=169
1+6+9=16
16*16=256+16=272

Like? Yes (1) | No   

Pranati Kundu   9 years AGO

16+16^2=272

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

sum of previous digit = x

x=1+6+9=16
y=x*x

y=16*16=256

x+y=256+16=272

Like? Yes (1) | No   

Srinivas   9 years AGO

1+6+9=16=x,y=256
x+y=272

Like? Yes (1) | No   

Jaspalsingh Parmar   9 years AGO

two series are there
4,7,13,16,22....
16,49,169,256,484.....
sum will be 256+16=272

Like? Yes (2) | No (2)  

SAGNIK DATTA   9 years AGO

y=x*x so only 16 + 16^2 satisfies the option

Like? Yes (1) | No (1)  

anand vijay   9 years AGO

given series is written as 4,4^2=16
next no will be 1+6=7 ,7^2=49(4+9=13)
13,13^2=169(1+6+9=16)
16,16^2=256
16+256=272 ans
option 3

Like? Yes (1) | No (1)  

ABHINAV PUSHPAM   9 years AGO

4, 4^2=16
1+6=7, 7^2=49
4+9=13, 13^2=169
1+6+9=16, 16^2=256
so, x=16 & y=256
sum= 272
option 3)

Like? Yes (1) | No (1)  

rajeev kumar   9 years AGO

16=1+6=7
49=4+9=13
169=1+6+9=16
16^2=256
256+16=272

Like? Yes (1) | No (1)  

RAKESH   9 years AGO

x = 1+6+9 = 16, y=x^2 = 256

x+y = 272

Like? Yes (1) | No (1)  

kishore   9 years AGO

4 ,4^2 , 7, 7^2, 13, 13^2, 16, 16^2

4+3=7 , 7+6=13 , 13+3 = 16

Like? Yes (1) | No (1)  

vivek   9 years AGO

As,
4*4=16.....(1+6)=7
7*7=49.....(4+9)=13
13*13=169.....(1+6+9)=16
16*16=256
so, x+y= 16+256=272

Like? Yes (2) | No (2)  

Anuradha   9 years AGO

4,4^2,(4+3),(4+3)^2,(4+3+6),(4+3+6)^2
=> next numbers are 4+3+6+3,( 4+3+6+3)^2=16,256
therefore sum is 16+256=272

Like? Yes (1) | No (1)  

Ramdas Singathiya   9 years AGO

from series y=x^2
x+y=x+(x^2) = X(X+1)
now check options

Like? Yes (1) | No (1)  

Sundar Kumar   9 years AGO

let us consider x = 16 then y = x^2 = 16^2 = 256
Therefore , Sum of x and y will be = 16+256 = 272

Answer: Option:3) 272

Like? Yes (1) | No (1)  

moumita   9 years AGO

4
4*4=16
4+3=7
7*7=49
7+6=13
13*13=169
13+3=16
16*16=256
So, x=16 & y=256
Sum=x+y = 16+256 = 272

Like? Yes (1) | No (1)  

umesh   9 years AGO

x=16 y=16*16
x+y=272
the sequence is in form of 3 ,6,3,6 alternate position difference

Like? Yes (1) | No (1)  

mani   9 years AGO

x=16
y=256 i.e. square of 16

x+y= 16+256 is 272

Like? Yes (1) | No (1)  

Niraj   9 years AGO

4, 16, 7, 49, 13, 169, x, y

4, (4)^2, (1+6), (7)^2, (9+4), (13)^2, (1+6+9), (16)^2

so X=(1+6+9) and Y=(16)^2
=> X+Y = 16+256 = 272

Like? Yes (1) | No (1)  

NESAB JAFAR   9 years AGO

di git is the square of another digit

Like? Yes (1) | No (1)  

VIKAS KUMAR THAKUR   9 years AGO

4*4=16
1+6=7
7*7=49
4+9=13
13*13=169
1+6+9=16
16*16=256
sum of x+y=16+256=272

Like? Yes (1) | No (1)  

b.subbarao   9 years AGO

4^2=16
1+6=7 then 7^2=49
4+9=13 then 13^2=169
1+6+9=16^2=256
so x=16,y=256 hence 16+256=272 there fore option 3 is correct

Like? Yes (1) | No (1)  

NITHYA   9 years AGO

=(16*16)+16
=272

Like? Yes (1) | No (1)  

Janamma Vunnam   9 years AGO

13+3=16 then 16*16=256
x=16,y=256 total =272

Like? Yes (1) | No (1)  

siddharth prakash singh   9 years AGO

x=16
y=256
x+y= 272

Like? Yes (2) | No (2)  

Josepheena Joseph   9 years AGO

4^2 = 16
1+6 = 7
7^2 = 49
4+9 = 13
13^2 = 169
1+6+9 = 16
16^2 = 256
ans = 16 + 256 = 272

Like? Yes (1) | No (1)  

M.RAGHAVENDAR   9 years AGO

16^2=256
256+16=272

Like? Yes (1) | No (1)  

PAWAN KUMAR   9 years AGO

x= 13+3=16
y=16*16 = 256
So, x+y = 272.

Like? Yes (1) | No (1)  

Yathiraj   9 years AGO

x=16
y=256
x+y=272

Option 3.

Like? Yes (2) | No (2)  

bhishma   9 years AGO

4+9=13-----13^2---169
1+6+9=16^2---256
256+16=272

Like? Yes (1) | No (1)  

Gourav Rajdhar   9 years AGO

y=x*x
so 256=16*16
hence 256+16=272

Like? Yes (1) | No (1)  

aman aditya   9 years AGO

4 followed by 4*4=16
7 followed by 7*7=49
13 followed by 13*13=169
16+16*16=272

Like? Yes (1) | No (1)  

ADARSH GAURAV   9 years AGO

1+6+9=16
16+256=272

Like? Yes (1) | No (1)  

Anubhav jain   9 years AGO

4
4^2=16
4+3=7
7^2=49
7+6=13
13^2=169
13+3=16
16^2=256
256+16=272

Like? Yes (1) | No (1)  

shirisha karakamukkala   9 years AGO

7-4=3
x-13=3
x=16
16^2+16=272

Like? Yes (1) | No (1)  

M.Ranjith Kumar    9 years AGO

The first no 13+3=16=x
Y=16*16=256
X+y=272

Like? Yes (1) | No (1)  

SENTU PAUL   9 years AGO

after solving the above problem,we get the value of x and y.
so, x=16 and y=256
x+y=272

option 3) 272

Like? Yes (1) | No (1)  

27 Apr 2015 Sequence

Missing number of the sequence
100, 110, ?, 133.1, 146.41 is

OPtion

1) 111
2) 113
3) 117
4) 119
5) 121
6) 123
7) 126
8) 127.21
9) 130.31
10)131

Solution

Every next number is 1.1 multiple of previous
110/100 = 1.1
146.41/133.1 = 1.1
So ?/110 = 1.1
? = 121

Option 5)

Correct Option: 5 Best Solution (53)

b.subbarao   9 years AGO

100----(1)
100+10%of100=110
110+10%of110=121
so the missing number is 121 hence the
5th option is correct answer

Like? Yes (4) | No (1)  

Surit Datta   9 years AGO

the series continues in the following way.
100*1.1 = 110
110*1.1 = 121
121*1.1 = 133.1
133.1*1.1 = =146.41
so option 5
that's it.

Like? Yes (2) | No   

NESAB JAFAR   9 years AGO

sum of the digit is incresing twicely

Like? Yes (1) | No   

MD SOHAIL AKHTER   9 years AGO

11 percent compound interest

Like? Yes (1) | No   

aman aditya   9 years AGO

10% of 100=110
10% of 110=121
10%of 121=133.1

Like? Yes (1) | No   

umesh   9 years AGO

the sequence is increased by 10%
so 121 will be ans

Like? Yes (1) | No   

SUSHANT KUMAR   9 years AGO

100*110/100=110
110*110/100=121
121*110/100=133.1
133.1*110/100=146.41

Like? Yes (1) | No   

kishore   9 years AGO

110 = 100 + 10% of 100
121 = 110 + 10% of 110
133.1 = 121 + 10% of 121 and so on

Like? Yes (1) | No   

Devendra Marghade   9 years AGO

Term*1.1=Next term
100*1.1=110
110*1.1=121
121*1.1=133.1
133.1*1.1=146.41
So ans. is 121 option (5)

Like? Yes (1) | No   

RAKESH   9 years AGO

110 * 1.1 = 121

Like? Yes (1) | No   

ANUJ KUMAR   9 years AGO

Each successive number is 10% higher than the previous number.
Accordingly,
100+10% of 100=110
110+10% of 110=121
121+10% of 121=133.1
133.1+10% of 133.1=146.41

Like? Yes (1) | No   

Ramdas Singathiya   9 years AGO

(next digit) / (previous digit) =1.1

Like? Yes (1) | No   

sravani   9 years AGO

121 is the answer.

Like? Yes (1) | No   

prabhat kumar   9 years AGO

100×11=1100/10=110
110×11=1210/10=121
121×11=1331/10=133.1
133.1×11=1464.1/10=146.41
so 121 is the ans.

Like? Yes (1) | No   

Sagar Jinachandran   9 years AGO

100*1.1=110
110*1.1=121
121*1.1=133.1
133.1*1.1=146.41

Like? Yes (1) | No   

Supriya Mondal   9 years AGO

Here, we can get the next number of the series by multiplying 1.1 to the previous number
Here,first term is=100
So, next term will be=100*1.1=110
Like that next term will be=110*1.1=121
Then, 121*1.1=133.1
Then, 133.1*1.1=146.41
So, option 5)121 is the right answer

Like? Yes (3) | No (2)  

ABHINAV PUSHPAM   9 years AGO

10% more of 100 =110
10% more of 110= 121
option 5)

Like? Yes (1) | No   

SAGNIK DATTA   9 years AGO

each term is 1.1*previous term
110=100*1.1
146.41=133.1*1.1

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

missing number is 121.

Like? Yes (1) | No   

Nibha   9 years AGO

by solving,
t3=100+(3-1)10

Like? Yes (1) | No   

shabana banu shaik   9 years AGO

10% of previous number is added to the next number......so 10% of 110 is 11...ao 11 is added to 110 which is 121

Like? Yes (1) | No   

Meenakshi   9 years AGO

100+10.0=110
110+11.0=121
121+12.1=133.1
133.1+13.31=146.41

option 5) 121

Like? Yes (1) | No   

mukund   9 years AGO

each term is the 10% more than previous term.

Like? Yes (1) | No   

siddharth prakash singh   9 years AGO

100*1.1=110
110*1.1=121
121*1.1=133.1
133.1*1.1=146.41

so the missing number of the sequence is 121.

Like? Yes (1) | No   

Sundar Kumar   9 years AGO

100 × 1.1 = 110
110 × 1.1 = 121
121 × 1.1 = 133.1
133.1 × 1.1 = 146.41 ...
Answer: Option 5)121

Like? Yes (1) | No   

Yathiraj   9 years AGO

Next number = Prev. number + 10% of prev. number

Like? Yes (1) | No   

suraj nath prasad   9 years AGO

succesive terms are multiplied by 1,1

Like? Yes (1) | No   

ADERU CHENCHU NITHISH   9 years AGO

100/5=20/2=10.........100+10=110
110/5=22/2=11..........110+11=121
121/5=24.2/2=12.1....121+12.1=133.1
133.1/5=26.62/2=13.31......133.1+13.31=146.41

Like? Yes (1) | No   

jalaj   9 years AGO

divide the 1st no by 10 and add the original number.e.g 100/10=10+100=110
110/10=11+110=121
121/10=12.1+121=133.1
133.1/10=13.31+133.1=146.41

Like? Yes (1) | No   

Niraj   9 years AGO

Next Term = Prev Term + (10 % Of Prev term)

Like? Yes (1) | No   

hari   9 years AGO

100 ,
100+10.0=110 ,
110+11.0=121
,121+12.1=133.1,
133.10+13.31 =146.41

Like? Yes (2) | No (1)  

Josepheena Joseph   9 years AGO

100/10 = 10
100+10 = 110
110/10 = 11
110+11 = 121
121/10 = 12.1
121+12.1 = 133.1
133.1/10 = 13.31
133.1+13.31 = 146.41

Like? Yes (1) | No   

Anuradha   9 years AGO

100+100/10=110
110+110/10=121
121+121/100=133.1
133.1+133.1/100=146.41

Like? Yes (1) | No   

SAMPURNA MITRA   9 years AGO

100+10.0,110+11.0,121+12.1,131.1+13.31 no.+decimal of it

Like? Yes (1) | No   

Madhumoy Gope   9 years AGO

110*1.1=121

Like? Yes (2) | No (1)  

vivek   9 years AGO

(100/10)+100=110
Here,
(100/10)+100=110
(110/10)+110=121
(121/10)+121=133.1
(133.1/10)+133.1=146.41
So missing term will be 121

Like? Yes (1) | No   

Rakesh Kumar Thakur   9 years AGO

Add the term with the same term by moving the decimal 1 place left.
100+10.0=110
110+11.0=121
121+12.1=133.1
133.1+13.31=146.41

Ans= 121

Like? Yes (1) | No   

Avishek Pattanaik   9 years AGO

1) 100 + 10.0 = 110
2) 110 + 11.0 = 121
3) 121 + 12.1 = 133.1
4) 133.1 + 13.31 = 146.41

Like? Yes (1) | No   

PAWAN KUMAR   9 years AGO

Next no = prev no*1.1
100*1.1 = 110
110*1.1 = 121
121*1.1 = 133.1
133.1*1.1 = 146.41.

Like? Yes (1) | No   

ROHIT SAHU   9 years AGO

different between number

Like? Yes (1) | No   

M.Ranjith Kumar    9 years AGO

THE first no 100 its 10percentag is 10so add the 10 with first no 110..and 110, 10percentage is 11 so add with 110 The ans is 121

Like? Yes (1) | No   

Gourav Rajdhar   9 years AGO

sum of each number is multiple of 2 to the sum of previous sum. viz 100=1+0+0=1, 110=1+1+0=2, 121=1+2+1=4, 133.1=1+3+3+1=8, 146.41=1+4+6+4+1=16
I.e. 1>2>4>8>16, here each sum is multiple of 2.

Like? Yes (1) | No   

Naveen Ramesh Kumar   9 years AGO

We are adding 10% of the current number to the same to get the next number.

Like? Yes (1) | No   

ankit kamboj   9 years AGO

100*1.1=110*1.1=121*1.1=133.1*1.1=146.41

Like? Yes (1) | No   

sompon temtheerakij   9 years AGO

100 + 10.0 = 110
110 + 11.0 = 121
121 + 12.1 = 133.1
133.1 + 13.31 = 146.41

Like? Yes (1) | No   

Ajay Kumar Gupta   9 years AGO

121
because every time increase in sequence is 10%
so 100+100*10%=110
110+110*10%=121
121+121*10%=133.1
and so on....

Like? Yes (1) | No   

sumanth   9 years AGO

100+10.0=110
110+11.0=121
121+12.1=133.1
133.1+13.31=146.41

Like? Yes (1) | No   

Neeraja Aruva   9 years AGO

100+10.0=110,110+11.0=121,121+12.1=133.1.....

Like? Yes (1) | No   

elakya   9 years AGO

110-100=10
121-110=11
133.1-121=12
146.41-133.1=13.31
seq 11,12,13

Like? Yes (1) | No   

mattina mano   9 years AGO

b/w 100 and 110 =10
b/w 146.41 and 121.65=13.31
the avg of 10 and 13.31 is 11.65
11.65+previous number (i.e) 11.65+10=121.65

Like? Yes (1) | No   

Jaspalsingh Parmar   9 years AGO

100, 11/10*100, 11/10*110, 11/10*121, 11/10*133.1, 11/10*146.41..............
so 100,110,121,133.1,146.41

Like? Yes (1) | No   

Deepika Maheshwari   9 years AGO

100/110=.9090
133/146.41=.9090
therefore according to the sequence given,
110/x=.9090
this implies
x=121

Like? Yes (1) | No   

shaik sharina   9 years AGO

100+100/10=110
110+110/10=121
121+121/10=133.1
133.1+133.1/10=146.41

Like? Yes (1) | No (1)  

24 Apr 2015 Solve Equation

x+y+z = 7
2x-y+z = 4
Then
11y-10x will be

OPtion

1) z
2) 3
3) 2z
4) 5
5) 3z
6) 8
7) 4z
8) 9
9) 5z
10)10

Solution

x+y = 7-z
2x-y = 4-z
On solving x = (11-2z)/3
and y = (10-z)/3
So 11y - 10x = 3z

Option 5)

Correct Option: 5 Best Solution (19)

moumita   9 years AGO

x+y+z=7 & 2x-y+z=4
Solving both the equations, we get, x= (11-2z)/3 & y=(10-z)/3
Now, substituting the value of x and y in the equation (11y-10x) , we get 3z.

Like? Yes (6) | No (5)  

Meenakshi   9 years AGO

x=1,y=2,z=4
11y-10x=12 or 3z

Like? Yes (1) | No   

Abhishek Ranjan   9 years AGO

multiply 4 in equation 1 and multiply 7 in equation 2 and subtract eqn1-eqn2
4x+4y+4z=28
-(14x-7y+4z=28)
11y-10x=3z

Like? Yes (1) | No   

MRITUNJAY   9 years AGO

equating z in both the equation we get
z=7-x-y
z=4-2x+y
7-x-y=4-2x+y
after solving this we get
y=-10/3,x=-29/3
so value of 11y-10x=11*-10/3-10*-29/3=60
=3*z
put the value of x and y in any equatio we get z=20.
11y-10x=3z

Like? Yes (1) | No   

Supriya Mondal   9 years AGO

Here, 2 equations are given and they are
x+y+z=7...................(i)
2x-y+z=4.................(ii)
Now add equation (i) and (ii)
x+y+z+2x-y+z=7+4
so,3x+2z=11
so,x=(11-2z)/3
Now, subtract equation (ii) from 2*equation (i)
2x+2y+2z-2x+y-z=14-4
so,3y+z=10
so,y=(10-z)/3

so, 11y-10x=11*{(10-z)/3} -10*{(11-2z)/3}
=(110-11z)/3 - (110-20z)/3
=(110-11z-110+20z)/3
=9z/3
=3z
So, option 5)3z is the right answer

Like? Yes (1) | No   

ankit kamboj   9 years AGO

by rearranging 2y=x+3 ,, hit and trial x=1,y=2 gives z=4 and it satisfies both the equation so it is a possible solution ,, hence 11y-10x=12=3*z

Like? Yes (1) | No   

Rakesh Kumar Thakur   9 years AGO

Firstly evaluate x & y in terms of z, we get
x=(11-2z)/3
y=(10-z)/3
now substitute the values of x & y in the given equation, we get
3z

Like? Yes (1) | No   

Neha Shahi   9 years AGO

x + y +z =7 ....(i)
2x - y + z =4 .....(ii)
from (i) and (ii) we get : x = (11 - 2z )/3 and y =(10 - z ) /3
putting the value of x and y in 11y - 10 x we get 3z
so option 5 is the correct answer

Like? Yes (1) | No (1)  

kishore   9 years AGO

we can write x+y = 7-z and 2x-y = 4-z make these equations (1) & (2) respt
add (1) & (2) we get x= (11-3z)/3
sub (1) & (2) by multiplying (1) with 2
then we get y= (10-z)/3
calculate 11y-10x we get 3z

Like? Yes (1) | No (1)  

umesh   9 years AGO

x+y+z=7.....1
2x-y+z=4....2
solve eq 1&2 we get 3x+2z=11.....3
put x=7-y-z
in eq 2 we get z-3y=10.....eq....4
solve eq 2&4
we get 3x+z=1...5
now solve eq 3&5 we get z=10,x=-3,y=0
put the value ans will be 3z

Like? Yes (1) | No (1)  

Srinivas   9 years AGO

on solving -x + 2y = 3
and 3y+z = 10
so -10x+11y = 3z

Like? Yes (1) | No (1)  

santosh kumar patel   9 years AGO

(x+y+z = 7) put x=1, y=2 and z=4
2x-y+z = 4 satisfy the abobe equations
so
11y-10x=3z

Like? Yes (2) | No (2)  

shreya saklecha   9 years AGO

we can write the given equation as:
x+y-7=-z
2x-y-4=-z
on soving both equations we get:
x=1/3(11-2z) y=1/3(-z+10)
putting this values of x &y in given equation:
ans. 3z

Like? Yes (2) | No (2)  

shaik sharina   9 years AGO

3x+2z=11
x=[11-2z]/3
y=10-z/3
11y-10x=3z

Like? Yes (2) | No (2)  

ANUJ KUMAR   9 years AGO

From given equations eliminating y variable we get:
3x+2z=11
solve for x we get:
x=(11-2z)/3
Now substitute x in any given equation say x+y+z=7 and solve for y we get:
y=(10-z)/3
Now put values of x and y in required equation 11y-10x we get
11*(10-z)/3-10*(11-2z)/3=3z

Like? Yes (1) | No (2)  

Jaspalsingh Parmar   9 years AGO

by solving by trial and error method
we get x=1,y=2,z=4
so
11*2 - 10*1 = 12
means 3*z=3*4 =12

Like? Yes (2) | No (3)  

poojasaisri   9 years AGO

given eqns 1+2=> 3x+2z=11 =>x=(11-2z)/3
substituting x in eqn 1 gives y=(10-z)/3
substituting x and y in 11y-10x =3z

Like? Yes (1) | No (2)  

siddharth prakash singh   9 years AGO

since x+y+z = 7
so, x=7-y-z
and since 2x-y+z = 4
so, y=2x+z-4
Therefore, 11y-10x= 11(2x+z-4) - 10(7-y-z)
=22x+11z-44-70+10y+10z
=22x+10y+21z-114
Also on solving both the given equation we get y=(10-z)/3 and x= 2y-3. so on putting the value of x and y we get,
required value as 3z

Like? Yes (1) | No (2)  

Anuradha   9 years AGO

Solve in matrix form:(calculating determinant)
x/(1+1)=-y/(1-2)=z/(-1-2)
=> x/2=y/1=z/-3
(i.e x=2,y=1,z=-3)

11y=11*1=11
10x=10*2=20
=> 11y-10x=11-20=-9
z=-3
=> 3z=-9
=>11y-10x=-9=3z

Like? Yes (1) | No (3)  

23 Apr 2015 Investment

A man invests some money in a business and get 10% returns in a year. Next year he invests total output in other business & gets 20% returns in the next year. In third year when he invests output after two year then he gets 30% loss in that year overall he receives.

OPtion

1) 5.4% Profit
2) 5.4% Loss
3) 7.6% Profit
4) 7.6% Loss
5) 3.9% Profit
6) 3.9% Loss
7) 4.6% Profit
8) 4.6% Loss
9) 6.1% Profit
10)6.1% Loss

Solution

Let he invests x rupees
Then x(1+0.1)(1+0.2)(1-0.3) = 0.924 x
So he receives 0.924 x means 92.4% of x
Loss is 7.6%

Option 4)

Correct Option: 4 Best Solution (26)

Supriya Mondal   9 years AGO

Let, his capital is Rs. 100
Then, after 1 year he get total=100+(10/100)*100=110
In the next year he will get total=110+(20/100)*110=132
Then, in the next year he will get total=(70/100)*132=92.4
So, overall he receives Rs. 92.4 against his capital Rs. 100
So, he loss (100-92.4)%=7.6%
So, option 4)7.6% loss is the right answer

Like? Yes (11) | No (1)  

ABHINAV PUSHPAM   9 years AGO

let the total amount of money be 100, then after one year 100+10%*100=110.
after 2nd year 110+20%*110=132.
after 3rd year 132-30*132=92.4;
net loss= 7.6%

Like? Yes (4) | No   

Jaspalsingh Parmar   9 years AGO

100
100+10=110
110
110+22=132
132-39.6=92.4
so loss =100-92.4 = 7.6 loss

Like? Yes (2) | No (1)  

sompon temtheerakij   9 years AGO

1st year = 100*1.1 = 110
2nd year = 1.1*1.2 = 132
3rd year loss = 132*30% = 39.6
output of 3rd year = 132-39.6 = 92.4
total loss = 100-92.4 = 7.6%

Like? Yes (1) | No   

SUSHANT KUMAR   9 years AGO

suppose sum be 100
10% profit means it became 110
now 20% profit on it means 110*120/100
132
now 30% loss means
132*70/100
I.e.92.4
so he get a loss of 7.6%

Like? Yes (1) | No   

ANUJ KUMAR   9 years AGO

Let the amount invested be x
After one year: x*1.10
After nxt year: x*(1.10)*(1.20)
overall: x*(1.10)*(1.20)*(0.70)
Equals to x*0.924
So, loss of 7.6%

Like? Yes (1) | No   

Anuradha   9 years AGO

to get overall profit user formula a+b+ab/100

in first 2 cases overall profit is: 10+20+(10*20)/100=32%

in next case overall profit is: 32+ (-30) + (-30)*32/100= -7.6
i.e -7.6% profit or 7.6% loss

Like? Yes (1) | No   

Neha Shahi   9 years AGO

let 100 rupees be invested then
1st year: output = 110
2nd year : profit =20/100 *110 = 22 ,output = 132 ,
3rd year : loss= 30/100 * 132 = 39.6 , output = 92.4
overall there was a loss of 7.6 % so option 4 is correct

Like? Yes (1) | No   

vivek   9 years AGO

let the money be rs 100 which the man invested in 1st year having 10% profit.
then, outcome after 1st yr will be 100*10/100+100=Rs 110
Again, he invested that money in 2nd yr and got 20% profit.
so outcome after 2nd year= 110*20/100+110=Rs 132
now, in 3rd yr he invested that money and got 30% loss,
so, total money recieved at the end of 3rd yr will be = 132 - 132*30/100= Rs 92.4
so there is loss for that person.
loss %= (100-92.4)/100*100=7.6%.

Like? Yes (2) | No (1)  

Sujit   9 years AGO

0.7 * 1.2 * 1.1 x = 0.924x
1-0.924 = 0.076
0.076*10 = 7.6

Like? Yes (1) | No   

VIPIN AGARWAL   9 years AGO

let day he invested Rs.100
first year output is Rs110
next year output is Rs132
but last year output is Rs92.4
therefore loss is of Rs7.6 ie 7.6%

Like? Yes (1) | No   

Math Lovers   9 years AGO

Let initial amount= x
total amount after 3 years = x * (110/100) * (120/100) * (70/100) = .924x

=> loss = 0.076x
=> %age loss = 76%

Like? Yes (1) | No   

jalaj   9 years AGO

lets assume he spends 100 10% return on 100.He gets 110.20% return on 110 he gets 132.30%loss on 132 he comes down 92.4.So,He gets a loss 7.6 overall

Like? Yes (1) | No   

moumita   9 years AGO

Let the principle amount,P, be x.
Then, after 1 year, t=1 year and R=10%
=> S.I=x*10/100*1 = x/10
Total amount ,A= S.I +P =11x/10
After 2nd year at 20% profit. S.I=11x/50
A=66x/50
After 3rd year with a loss of 30% , S.I=-198x/500
A=462x/500 = 0.924x
Amount he receive after 3 years = x-0.924 = 0.076x
i.e., 7.6% loss
Ans (4)

Like? Yes (2) | No (1)  

Anuj Rai   9 years AGO

Invested money=100
Output after first year =110
second year invested money =110
output after second year =132
Third year invested money=132
earn loss of 30%
i.e. (70/100)*132=92.40
so the net loss = 100-92.40=7.6
Loss =7.6%

Like? Yes (1) | No   

Stoycho   9 years AGO

1st year:
x+x*0.1=x(1+0.1)=1.1x

2nd year:
1.1x+1.1x*0.2=x(1.1+0.22)=1.32x

3rd year:
investment 1.32x
loss -1.32x*0.3= -0.396x
1.32-0.396=0.924 or 92,4% of x => 100-92.4 = 7.6% loss

Like? Yes (1) | No   

Abhishek Ranjan   9 years AGO

let his investment is 100
1st year output= 110
2nd year output=132
3rd year output= 92.4
final loss 7.6%

Like? Yes (1) | No   

SENTU PAUL   9 years AGO

After calculating the above problem we get the answer and that will be 7.6 % Loss
so, option 4) is the answer

Like? Yes (1) | No   

sangrambadi sahoo   9 years AGO

let invest ment=100
10% of 100 =10 so total =110
20% 110 so total=132
30% loss of 132=92.4%
so over all loss=7.6%

Like? Yes (1) | No   

kishore   9 years AGO

let the amount be 'x'
first time he had got 10% return so the amount now he has x * 110/100
this amount is invested in second time
second time he had got 20% so now x * (110/100) * (120/100)
third he had loss of 30% so
x * (110/100) * (120/100) * (70/100) = 92.4/100
so he has 7.6 % loss

Like? Yes (1) | No   

Madhumoy Gope   9 years AGO

%=(1-(1+(1+1/10)*1/5))*100=7.6% loss

Like? Yes (1) | No   

Srinivas   9 years AGO

let the investment is 100
profit 10 %=10
total 110
2nd company inv 110
profit 20%=22
third company inv = 132
lost 30% = 39.6
so 132-39.6 = 92.4
So 7.6 loss

Like? Yes (1) | No   

shaik sharina   9 years AGO

after first year get total amount=100+10=110
after 2nd year get total amount=110+((20/100)*110)=132
after 3rd year get loss=30/100*132=39.6
resultant=132-39.6=92.4
loss=100-92.4=7.6
loss percent=7.6/100=7.6%

Like? Yes (1) | No   

aman aditya   9 years AGO

suppose he has Rs 100
after 1 year 110
after 2 year 132
after 3 year loss 30% i.e 132-39.6=92.4
loss= 7.6%

Like? Yes (1) | No   

mukund   9 years AGO

the answer is 7.6

Like? Yes (1) | No   

MUKESH YADAV   9 years AGO

let amount invested is x. then,
(0.924x-x)*100/x= -7.6%

Like? Yes (1) | No