Closed Room Riddle
Riddle: You are in a room were there are no windows, no doors, and the walls are made of diamond. But the floor is made of hardened dirt. Also, underground there are killer beasts that are afraid of the light. All you have is a mirror, a lamp, and a spoon. How do you escape?
Answer: You look in the mirror, you see what you saw. You grab the saw, cut open the floor, use the lamp to reflect the light of the spoon and scare away the beasts. then you cut your way out with the saw.
Source: https://www.riddles.com/4602
