Logic Riddles

Question: what goes down but never goes up?

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?

Question: If there's a pound of lead and feather, which is heavier?

Question: Bill was a Pilot. He was going to retire. But before he retired he wanted to do one more flight over the Atlantic Ocean (Other people were on the plane). Bill crashed (To no surprise, he was 94) and every single person on the plane died. The next week Charlie Marcial was interviewed on a T.V. show. He was famous because he survived Bill's last plane crash. How is this possible?