Multiple choice

A father tells his son, "I was one year more than two times of your present age when you were born. If the father's present age is 64 years, how old was the boy 4 years ago?"

  1. 21 years

  2. 20 years

  3. 18 years

  4. 17 years

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let son's current age = s. When son was born (s years ago), father was (64-s). Given: (64-s) = 2s + 1, so 64-s = 2s+1, giving 3s=63 and s=21. Boy's age 4 years ago = 21-4 = 17 years.