Multiple choice general knowledge math & puzzles

A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?

  1. 7

  2. 9

  3. 8

  4. 10

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

Let C's age be x. Then B's age is 2x (twice as old as C), and A's age is 2x+2 (two years older than B). The equation is: x + 2x + (2x+2) = 27, which simplifies to 5x + 2 = 27, so 5x = 25 and x = 5. Therefore, B's age = 2x = 10 years. This is a standard age-related algebra problem.