# What is The Age of The Youngest Boy?

The sum of ages of 3 boys is 81 years. If all the boys were born at an equal interval of 6 years, then what is the age of the youngest boy?

- 23 years
- 21 years
- 22 years
- 24 years

**Answer: (2) 21 years**

**Explanation:-
**The sum of ages of 3 boys = 81 years

If all the boys were born at an equal interval of 6 years,

Let the ages of the boys be X, X + 6 and X + 12.

Then, X + X + 6 + X + 12 = 81

3 X + 18 = 81

3 X = 81 – 18

X = 63/3

X = 21 years

Then, the age of the youngest boy is X = 21 years.

Hence, the answer is (2) 21 years.