Fun Riddles

Question: A mirror for the famous, but informative to all.
I'll show you the world, but it may be a bit small.

What I am?

Question: Which eight-letter word still remains a word after removing each letter from it?

Question: To get to the word SCARY to ALONE, changing only one letter at a time to make 8 different words including SCARY and ALONE.

Question: What is harder to catch the faster you run?

Question: A boy at a carnival went to a booth ran by a man who said "If I can 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 agreed, 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?