Today Mary’s father is four times as old as Mary. Ten years ago, he was 14 times as old. How old is Mary today?	Pick one.
A) 7
B) 9
C) 11
D) 13
E) 15
13ad's age = 4M   14*(M-10) = 4M-10   10M = 130   M = 13   The answer is 13.
<result>D</result>
Today Mary’s father is four times as old as Mary. Ten years ago, he was 14 times as old. How old is Mary today?