Good Riddles

Question: What did the calculator say to the Math student?

Question: So a girl is scared of the dark, yet she always has the lights off in her room, why?

Question: He has married many women, but has never been married. Who is he?

Question: When the day after tomorrow is yesterday, today will be as far from Wednesday as today was from Wednesday when the day before yesterday was tomorrow. What is tomorrow?

Question: How can you throw a ball 20 meters, and have it come back to you without hitting anything?