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

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The difference between the ages of two of my three granchildren is 3.my eldest grandchild is three times older than the age of my youngest grandchild and my eldest granchild's age is two years more than the ages of my two youngest grandchildren added together.how old is my eldest grandchild?
(a)12(b)15(c)10(c)13

Asked In TCS Ragini (13 years ago)

Solved Biswajit Das Read Solution (5)

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Read Solution (5) :

Biswajit Das  (13 years ago)

if u want to find out this solution using calculation it will be messed up.
rather doing so go for logical thinking.....
here eldest son is thrice of youngest.
so,the age of the eldest child should be divisible by 3.
hence, 12 0r 15
then applying condition 12 is not possible as youngest will be 4 then
so middle may be 9 or 7 but which does nt satisfy the condition
elder=2+(other's sum ofage)
taking 15 is satisfying all the condition
option (b) is correct.

Is this solution Helpfull? Yes (28) | No (3)  

Somil Nain  (13 years ago)

b) x,y,z be ages where x is of eldest,z is of youngest
y-z=3
x=3z
x=y+z+2
solving x=15 ans

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

Somil Nain  (13 years ago)

As given difference between any of two grandchildren if you take x-y=3 solution gives y=0 not possible so take y-z =3

Is this solution Helpfull? Yes (3) | No (1)  

anandhan  (12 years ago)

lets take elder's age as E ,middile son's age as M , younger as Y ...
given equ are E=3Y+Y ---(1)
E=2+M+Y ---(2)
SO if elder's age is 10 thn middle age will be 5.5 and younger's age will be 2.5 ... so satisfying all condition ....

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SOURABH KESHRI  (5 years ago)

try from option c d ruled out because eldest is 3times youngest...now pick a and b try to satisfy equation a/c to question
so b ans

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