1. The man wrote "your exact weight" on the paper.
2. A gold coin.
3. edam
4. t-h-i. the next three letters in "this riddle!"
5. UNKNOWN
6. the rain!
7. fire
8. he was born in room 1955!
9. a stamp?? a potato??
10. The boy stoop underneath a container of water for 10 minutes!!
BONUS: Still working on it...
PS: I am 12 years old and figured these out with no problem. If you can't figure them out youself, you must be pathetic!!!