Good Riddles

Question: what is a bud inside the house and flower outside the house

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?

Question: what goes down but never goes up?

Question: I look green but I am not. I look blue but I am not. I look red but I am not. What am I?

Question: What number when divided in half becomes zero?