Multiple choice

The ratio between the present ages of A and N is 2: 3 respectively. N's age sixteen years hence will be twice of A's age four years hence. What is the difference between the present ages of A and N?

  1. 6

  2. 12

  3. 8

  4. 4

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

A:N = 2:3, let A=2x, N=3x. N+16 = 2(A+4) means 3x+16 = 2(2x+4) = 4x+8. Solving: 16-8 = 4x-3x, so x = 8. A=16, N=24. Difference = 24-16 = 8 years.