Multiple choice

The ratio between the present ages of Anu and Balbir is 5 : 3, respectively. The ratio between Anu's age 4 years ago and Balbir's age 4 years hence is 1 : 1. What is the ratio between Anu's age 4 years hence and Balbir's age 4 years ago?

  1. 4 : 1

  2. 2 : 4

  3. 3 : 2

  4. 3 : 1

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

Let Anu's age be 5x and Balbir's be 3x. (5x - 4) / (3x + 4) = 1/1. 5x - 4 = 3x + 4, so 2x = 8, x = 4. Anu = 20, Balbir = 12. Ratio (20+4) : (12-4) = 24 : 8 = 3 : 1.