A father said to his son, “I was as old as you are at the present at the time of your birth”.

If the father’s age is 60 years now, what was the son’s age ten years back?”

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### Answer: 20 Years.

Explanation:

Let the son’s current age be x

So father’s age x years back when son was born => 60 – x = x;

We can solve this as;

2x = 60;

Therfore;

x = 30 = son’s current age

10 Years back son’s age = 30-10 = 20 years