Multiple choice

A's age is twice the B's age. If 10 years ago, A's age was four times the B's age. What is A's present age?

  1. 36 years

  2. 38 years

  3. 32 years

  4. 39 years

  5. 30 years
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Let B's present age be x. Then A = 2x. Ten years ago: A-10 = 4(B-10), so 2x-10 = 4x-40, which gives 2x = 30, so x = 15. Therefore A = 2*15 = 30 years. Checking: 10 years ago A was 20, B was 5, and 20 is indeed 4 times 5.

Keep practicing — related questions