Indestructible Box
Riddle: You are trapped inside of a completely indestructible box through conventional means. You cannot call for help, and no one can find you. The only objects you have to escape with is a mirror and a round table. How do you escape?
Answer: You look in the mirror and see what you saw. You take the saw, saw the table in half. Two halves make a hole, climb through the hole and you are out.
Source: https://www.riddles.com/6640
