Riddles !!!

Here are some riddles to solve:

1. You can hold it without using your hands or arms,What is it???
2. I can run but I can't walk, a mouth but I can't talk, a head but I can't think, a bed but I can't sleep. Who am I?
3. My life can be measured in hours,I serve by being devoured,Thin, I am quick,Fat, I am slow,Wind is my foe. Who am I?
4. 
   I have an eye but cannot see. I am stronger and faster than any man alive but have no limbs. Who am I?
5. 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 USD 50, but if I cannot, I will pay you USD 50." The boy looked around and saw no scale so he agrees, thinking no matter what the guy 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?