Good Riddles

Question: Imagine that you enter a room, but the door shuts behind you and you are locked inside. The room is 3 meters high, and 6 meters x 6 meters as a square form. It is dark, the floor is metal just like the walls and the ceiling. You cannot destroy the walls, ceiling, floor or door. How to you get out?

Question: When it's warm it has something warming it, but when it's cold it's naked. What is it?

Question: There are 50 crows on a wire, a hunter shoots and kills three. How many are there left on the wire?

Question: How far can a dog run into the woods?

Question: I'm fat and I'm round and I cause much joy, I'm often a dogs favorite toy. What am I?