A man is 12 years older than his brother. In two years, his age will be twice the age of his brother. The present age of his brother is:  Pick one.
A) 10  B) 21  C) 22  D) 23  E) 24

Rationale: let the brother ' s present age be x years . then , man ' s present age = ( x + 12 ) years . ( x + 12 ) + 2 = 2 ( x + 2 ) x + 14 = 2 x + 4 x = 10 . answer : a
Answer: A