The present ages of Ishaan and his mother are in the ratio $2 : 7$. Six years ago the ratio was $1 : 5$. How old will his mother be 4 years from now?

Explanation

1. 01

   Let the present ages be 2x and 7x.

2. 02

   $\frac{2x - 6}{7x - 6} = \frac{1}{5}$ gives $10x - 30 = 7x - 6$, so $x = 8$.

3. 03

   Mother's present age = 56, so in 4 years she will be 60.