Latest TCS Aptitude Question SOLUTION: One grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other

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(#M40001734) TCS question 2010 question Keep an EYE

One grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other two children. What is the age of eldest child?
(a) 5 (8) 10 (c) 8 (d) 15

Solution

Question data are wrong.
According to ours consideration , suggestion of SATYAJIT KR CHOUDHARY for the question is correct and his answer is absolutely correct
Thanks SATYAJIT, for giving a true clue

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Asked In TCS (13 years ago)

Solved Read Solution (5)

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Read Solution (5) :

satyajit kr choudhary  (13 years ago)

The 2nd condition given is wrong it should be two more than the age of other two children...

Let the three grandchildren age be a,b and c
Thus, a is youngest, c is eldest.
c = 3a.........(i)
c = 2+(a+b)..........(ii)
=> 3a = 2+a+b
=> 2a = 2+b
Thus, the ages are.....
a, 2a-2 , 3a.

Two of their difference is 3.
Thus, a- 2 =3 or a+2 =3 or 2a =3
a =5 or a =1 or a =3/2.

Thus ages are, 5,8,15
or , 1,0 3 (not possible). or 3/2, 1, 9/2 (not possible.).
The answer should be 15.

Is this solution Helpfull? Yes (109) | No (17)  

kannan  (13 years ago)

Solution: there are 3 childs,let the age of younger be x,elder be 3x,so the middle one be m,3x=2+x+m,then we have a-b=3 or b-c=3,or a-c=3, then for answer we have to go via options, substitute that in above equations

Is this solution Helpfull? Yes (3) | No (13)  

suman kundu  (13 years ago)

3x=2+2x+3

ans-8

Is this solution Helpfull? Yes (2) | No (31)  

ZP  (9 years ago)

b-c = 3_______________(1)
a-3c= 0 ______________(2)
a-(b+c)=2 _____________(3)
_________________________________solve 3 equation and get the answer.
a=15, b=8, c=5

Is this solution Helpfull? Yes (1) | No   

shaik  (9 years ago)

given three children elder be E
middle be M
younger be Y
As per question...
E-M=3
M-Y=3
E=3Y
E=2(M+Y)
3Y-M=3
M-Y=3
adding both eq..2Z=6
Z=3
We know.........
E=3Z
E=9

Is this solution Helpfull? Yes | No (2)  

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