Aman’s age is three times his son’s age. Ten years ago he was five times his son’s age. Find their present ages.

Let the son’s age is x years. Then, Aman’s age is 3x years.

3x – 10 = 5 (x-10)


3x – 5x = -50 + 10


- 2x = -40


x = 20


thus, son’s age is 20 years and Aman’s age is 60.


11