Good Riddles

 
Riddle (medium)

Question: What sport is not a sport

Riddle (medium)

Question: What is in the middle of a human?

9 (medium)

Question: How do you make 9 by just 3 toothpicks?

Guess what ? (medium)

Question: I start at the beginning and I finish at the end I fly through the middle and I return again.

Question: What are the tree mistake in this sentence?