Fun Riddles

Question: What is heavy one way and not the other?

Question: A man pulls over and goes into a building.He came back with a bucket of water,he dumps it on the sidewalk.Why did he pour the water on the sidewalk?

Question: How high would you have to count before you use the letter 'A' in the spelling of a number?

Question: What flag has five circles in it?

Question: Four hang, four sprang, two point the way, two to ward off dogs, one dangles after, always rather dirty.

What am I?