Latest TCS Aptitude Question SOLUTION: The difference between the ages of two of my three grandchildren is 3. My eldest grandchild's age is three times than the age of my youngest grandchild and my eldest grandchild's a

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The difference between the ages of two of my three grandchildren is 3. My eldest grandchild's age is three times than the age of my youngest grandchild and my eldest grandchild's age is two years more than the ages of my two youngest grandchildren added together. How old is my eldest grandchild?
15
12
13
10

Solution

youngest be x , then eldest = 3x.
3x = y + x + 2 => y = 2x -2
so ages are 3x , 2x-2 and x respectively.
now check the options. 10 and 13 are not suitable in place of 3x so on taking 12 for 3x, x=4 so ages are 12,6,4 but this answer is not possible according to the condition- The difference between the ages of two of my three grandchildren is 3
so take 3x=15, x=5 so ages are 15,8,5 and 8-5 =3 so 15 is the correct answer
This answer is given by SRUJAN and is the correct answer


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Asked In TCS Deepesh goyal (13 years ago)

Solved Read Solution (2)

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srujan  (13 years ago)

youngest be x , then eldest = 3x.
3x = y + x + 2 => y = 2x -2
so ages are 3x , 2x-2 and x respectively.
also difference between two of the child's ages is 3
so 2x-2 -x = 3=> x = 5 , so 3x = 15
hence option 3

Is this solution Helpfull? Yes (16) | No (3)  

vaibhav chugh  (13 years ago)

only 2 r d possibilities i.e 12 n 15 bcz only dese r divisible by 3..but if ans is 12 den ages must b 12,4 n 7 but dis do not fulfills d criteria therefore
ans is a
as if ans is "a" den dere ages r 15,5 n 8 which satisfies d condition..

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