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 12, the how old is B? Pick:
A) 10 years B) 4 years C) 6 years D) 15 years E) 16 years
Let C's age be x years. Then, B's age = 2x years. A's age = (2x + 2) years.   (2x + 2) + 2x + x = 12   5x = 10   x = 2.   Hence, B's age = 2x = 4 years.   4 years)
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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 12, the how old is B?