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Problems on Ages - General Aptitude

Q1:

The sum of ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?

A 4 years

B 8 years

C 10 years

D None of these

ANS:A - 4 years

Let the ages of children be x, (x + 3), (x + 6), (x + 9) and (x + 12) years. Then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 50  5x = 20  x = 4.  Age of the youngest child = x = 4 years.