Really hard riddles need help

1- A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50."

The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less.

In the end the boy ended up paying the man $50. How did the man win the bet?

2-It has a golden head
It has a golden tail
but it hasn't got a body.

What is it?

3- What kind of cheese is made backwards?

4- What is the next 3 letters in this riddle?
o t t f f s s _ _ _

5- A box without hinges, key, or lid,
Yet golden treasure inside is hid.

What is it?

6- Runs smoother than any rhyme, loves to fall but cannot climb!

What is it?

7- You feed it, it lives, you give it something to drink, it dies.

What is it?

8- A man was born in 1955. He's alive and well today at age 33. How is this possible?

9- I soar without wings, I see without eyes.
I've traveled the universe to and fro.
I've conquered the world, yet I've never been anywhere but home.
Who am I?

10- A magician was boasting one day at how long he could hold his breath under water. His record was 6 minutes. A kid that was listening said, "that's nothing, I can stay under water for 10 minutes using no types of equipment or air pockets!" The magician told the kid if he could do that, he'd give him $10,000. The kid did it and won the money. Can you figure out how?

Bonus Riddle

He starts and ends 2 common English words. One painfull in love, One painfull in everyday matter. Do you know what 2 words I must be?

I figured number one was that he asked the boy his wheight then wrote it on the paper if u anwser this contact me at <email address removed by mod.>