Good Riddles

 
Riddle #875 (medium)

Question: A man runs into a bar and asks for a glass of water. The bartender pulls out a shotgun and yells at him. The man thanks the bartender, then walks out of the bar happily.

Why did the man thank the bartender?

Riddle #615 (medium)

Question: The more of me you have, the longer your life.
The more of me you have, the less you have left.

What am I?

Riddle #818 (medium)

Question: A man finds a small iron coin dated 154 B.C., what's it worth?

Riddle #760 (medium)

Question: I'm number three.
But I'm not a number.
I'm hot and cold at the same moment but not at the same time.
I'm number three.
But I'm not a number.

Who or what am I?

Riddle #410 (medium)

Question: When is 1500 plus 20 and 1600 minus 40 the same thing?