Logic Riddles

Question: A man goes down to the beach and starts walking on the beach, he has to get to the circus in a hurry and so he practices his act on the way, even though he had walked for an hour his feet weren't the least bit tired, why?

Question: Tom and Joe want to sit behind each other in class and the teacher arranges them so they are both happy.

How did the teacher do so?

Question: A mother is 21 years older than her child. In 6 years the mother will be 5 times older than her baby.

Where is the father?

Question: An archaeologist is searching some caves and discovers two frozen people that have somehow remained completely intact. He immediately recognizes them and knows that they are Adam and Eve, the first two people.

How did he know this?

Question: What relation would your father's sister's sister-in-law be to you?