Question

X is 5 years older than Y. The total of the current ages of X and Y is 33 years. What will be the age of Y after 7 years? 
1. 14 years
2. 21 years
3. 22 years
4. 20 years

Answer 1

Correct Answer - Option 2 : 21 years

Let, the age of Y is 'a'

The age of X is 'a + 5'

The total of the current age of X and Y is :

X + Y = 33

a + 5 + a = 33

2a = 33 - 5

2a = 28

a = 28 ÷ 2

a = 14

So, the present age of Y is 14.

After 7 year age is Y is 14 + 7 = 21

Hence, '21' is the correct answer.