Logic Riddles

Question: A cowboy rode to an inn on Friday. He stayed two nights and left on Friday. How could that be?

Question: How do you make the number one disappear by adding to it?

Question: The more you add, the less it weighs.

Question: There is a chain nailed to the wall. The chain is 10 feet long and the center of the chain dips down 5 feet from where each side of the chain is nailed to the wall. How far are the 2 ends of chain from each other?

Question: A natural state, I'm sought by all.
Go without me, and you shall fall.
You do me when you spend,
and use me when you eat to no end.

What am I?