Riddle

I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?

Choose an answer

A.I am 30 and my daughter is 7.5
B.I am 44 and my daughter is 11
C.I am 50 and my daughter is 12.5
D.I am 40 and my daughter is 10
Hint: It's a 6-word phrase with 18 letters, starting with "I".

Answer

I am 40 and my daughter is 10

Why this is the answer

If the parent is 4x and the child is x now, then in 20 years: 4x + 20 = 2(x + 20), which solves to x = 10, so the parent is 40 and the child is 10.

This riddle is filed under Time, Money, Music Riddles and rated Hard.