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
3
B
4
C
5
D
6
Correct Answer: 4
Let ages of children are x, X + 3, X + 6, X + 9, X + 12 respectively. Now, X + X + 3 + X + 6 + X + 9 + X + 12 = 50 5X + 30 = 50 5X = 20 X = 4 Age of the youngest child is 4 years.