Question : Directions: A father tells his son, "I was three times your present age when you were born". If the father's present age is 48 years, how old was the boy 4 years ago?
Option 1: 24 years
Option 2: 8 years
Option 3: 12 years
Option 4: 16 years
Correct Answer: 8 years
Solution :
Let the present age of the son be A years.
Father's age at the time of the birth of his son = (3 × A) years
Father's present age = Father's age at the time of the birth of his son + Present age of the son
⇒ Father's present age = 3A + A = 4A years
But, the father's present age is 48 years.
⇒ 4A = 48
⇒ A = 12 years
The present age of the son is 12 years.
4 years ago, Son's age = 12 – 4 = 8 years
So, the age of the son 4 years ago was 8 years. Hence, the second option is correct.
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