A is three years older than B who is thrice as old as C. If the total of the ages of A, B and C be 27, the how old is B?
Pick:  A) 10 years  B) 12 years  C) 14 years  D) 15 years  E) 8 years
Let C's age be x years. Then, B's age = 3x years. A's age = (3x + 3) years.   (3x + 3) + 3x + x = 31   7x = 28   x = 4.   Hence, B's age = 2x = 8 years.   8 years)
<result>E</result>
A is three years older than B who is thrice as old as C. If the total of the ages of A, B and C be 27, the how old is B?