Multiple choice

The ratio between the ages of A and B is 3 : 5 and the sum of their ages is 56 years. The ratio between their ages 7 years ago was-

  1. 1 : 2

  2. 2 : 3

  3. 3 : 4

  4. 3 : 5

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

Current ages: A = (3/8) × 56 = 21 years, B = (5/8) × 56 = 35 years. Seven years ago: A was 21-7 = 14, B was 35-7 = 28. Ratio 7 years ago = 14:28 = 1:2. The ratio between their ages 7 years ago was 1:2.