Good Riddles

Question: Without me, nothing exists. What am I?

Question: Leap Year is every 4 years. True or False ?

Question: A man walks into a completely dark room. There is a box on a table at the other end of the room and immediately the man knows one of the contents of the box. He cannot smell, see, or hear it.

How does he immediately know what is inside?

Question: What is older than Obama, sits still as stone, but in some people's eyes is more appreciated than the president's home ? Hint: HIS nickname has Two words and starts with H and the second with A.

Question: Two coins make 30 cents one of them isn't a nickel what are they?