Good Riddles

Question: A man is twenty years old but has only had five birthdays. How is that possible?

Question: What is black when you buy it, red when you use it, and gray when you throw it away?

Question: Can you name three consecutive days without using the words Wednesday, Friday, or Sunday?

Question: I run over fields and woods all day. Under the bed at night I sit not alone. My tongue hangs out, up and to the rear, awaiting to be filled in the morning.

What am I?

Question: A surgeon named Hal and a bus driver named Al are both in love with the same woman named Paige. Al needs to go for a long trip of 10 days. Before he left he gave Paige 10 apples. Why?