A man is 20 years older than his son. In two years, his age will be twice the age of his son. The present age of the son is?	Pick:
A) 11	B) 25	C) 27	D) 18	E) 91

Rationale: "let the son ' s present age be x years . then , man ' s present age = ( x + 20 ) years . ( x + 20 ) + 2 = 2 ( x + 2 ) x + 22 = 2 x + 4 = > x = 18 . answer : d"
Answer: D