Today Mary’s father is four times as old as Mary. Three years ago, he was 5 times as old. How old is Mary today? Choose one:
A) 6	B) 8	C) 10	D) 12	E) 14
12ad's age = 4M   5*(M-3) = 4M-3   M = 12   The answer is 12.
<result>D</result>
Today Mary’s father is four times as old as Mary. Three years ago, he was 5 times as old. How old is Mary today?