Good Riddles

Question: A man hangs his hat and walks 500 yards with his eyes closed. He then turns around and shoots his hat with his pistol with his eyes still shut.

How did he do this?

Question: All things I devour: Birds, beasts, trees, flowers.
I gnaw iron, bite steel.
I grind hard stones to meal.

What am I?

Question: You're in a room with no doors or windows. Just a mirror and a table.

How do you get out?

Question: It is always bought when you're hungry, but it doesn't get eaten. What am I?

Question: A horse travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. How is this situation possible?