# What will be the Son’s Present Age in Years?

Present ages of father & son are in the ratio of 5:1 respectively. Seven years later this ratio becomes 3:1. What is the son’s present age in years?

- 8
- 7
- 6
- 5

**Answer: (2) 7**

**Explanation:-**

Let be the age of the father = 5X and age of boy = X

According to the question,

(5X + 7) /(X + 7 ) = 3/1

By cross multiplication-

5X + 7 = 3X + 21

5X – 3X = 21 – 7

2X = 14

X = 14/2

X = 7

Thus, the present age of the son is 7 years.

Hence, the answer is (2) 7.