Good Riddles

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?

Question: In spring I look gay, Covered in a green array, The warmer it gets the more clothing I wear, As the cold grows, I throw away my clothes.

What am I?

Question: If you have an 11 minute and 13 minute hourglass, how can you accurately time 15 minutes?