A father is four times as old as his son. In twenty years, he'll be twice as old. How old are they now?
Choices:
A) 5,40  B) 10,40  C) 20,40  D) 10,30  E) 15,30
If F is age of father and s is age of son   f=4s   f+20 = 2*(s+20)   4s+20 = 2s+40   2s=20   s=10   F=40   ANSWER:10,40
<result>B</result>
A father is four times as old as his son. In twenty years, he'll be twice as old. How old are they now?