Question

Holly's grandfather is 52 years older than her. In 7 years, the sum of their ages will be 70. What is Holly's present age?

Answer 1

`4` years old.

Explanation:

`H` is Holly’s age, `G` is her grandfather's.

`H+52=G`

`H+7+G+7=70`

So

`H-G=-52`

`H+G=56`

Therefore,

`H=4`