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, then how old is B?

Question: 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, then how old is B?

Solution:
Let C's age be x years.
Then, B's age = 2x years
A's age = (2x + 2) years

According to the question,
⇒ (2x + 2) + 2x + x = 27
⇒ 5x = 25
⇒ x = 5

Hence, B's age = 2x = 10 years