Good Riddles

Question: You can only keep it once you give it to somebody.

What is it?

Question: As I was going to St. Ives,
I met a man with seven wives,
Each wife had seven sacks,
Each sack had seven cats,
Each cat had seven kits:
Kits, cats, sacks, and wives,
How many were there going to St. Ives?

Question: In Michigan you cannot take a picture of a man in a green hat.

Why?

Question: I take what you receive and surrender it all by waving my flag.What am I?

Question: If you look at my face there won't be 13 any place.