Logic Riddles

Question: I was crucified to keep murders out of the maze. What am I?

Question: what goes down but never goes up?

Question: A man wanted to enter and exclusive club, but did not know the password to get in. He waited by the door and listened. The doorman said "Twelve" and the other man said "Six" and was let in. A second member came up and the doorman said "Six" to which the member replied "Three" and was let in. The man went up and the doorman said to him "Ten" the doorman said "Five" but was not let in. Why?

Question: What number when divided in half becomes zero?

Question: How much does it worth to shoot a free throw in a game of basketball?