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? Options
A) 7 B) 8 C) 9 D) 10 E) 11

Rationale: "let c ' s age be x years . then , b ' s age = 2 x years . a ' s age = ( 2 x + 2 ) years . ( 2 x + 2 ) + 2 x + x = 27 5 x = 25 = > x = 5 hence , b ' s age = 2 x = 10 years . answer : d"
Answer: D