A boy was at a carnival. He 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 agreed, thinking no matter what the man wrote he would just say that he weighed more or less.
In the end, the boy ended up paying the man $50. How did the man win the bet?
Just a quick reminder: In the comments section, you may post yes/no questions to help you gather more information before making your guess. Good luck!