Multiple choice

Five years ago the sum of the ages of the father and his son was 40 years. Five years hence the age of the father will be three times his son’s age. The present age of the father is

  1. 40 years

  2. 35 years

  3. 45 years

  4. 30 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let son's present age = x, father's present age = y. Five years ago: (x-5)+(y-5)=40, so x+y=50. Five years hence: y+5=3(x+5), so y=3x+10. Substituting: x+(3x+10)=50, giving 4x=40, x=10. Therefore y=40. The father is currently 40 years old. Option A is correct.

Keep practicing — related questions