A father tells his son, "I was of your present age when you were born." If the father is 36 years old now, how old was the boy 5 years ago?
- 11
- 12
- 13
- 1 4
Explanation
Let the son's present age = x
Then father's age when son was born = x
So current father's age = x + x = 2x
Given father's age now = 36
⇒ 2x = 36 → x = 18 (son's current age)
5 years ago: 18 – 5 = 13
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