Math Riddles
Number and mathematical puzzles that require calculation.
The Age Puzzle
A father is 4 times as old as his son. In 20 years, the father will be twice as old as his son. How old are they now?
Hint: Let's say the son's age is x and the father's age is 4x.
Answer: The father is 40 years old, and the son is 10 years old.