Good Riddles

 
Riddle #753 (medium)

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?

Riddle #3280 (medium)

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

Riddle #60 (medium)

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?

Question: There were 4 men fishing. The boat tipped, and every man fell into the water. Not a single man got wet. How is this possible?