Riddle: Mr. and Mrs. Jones went on a picnic. They had 13 children, who each had 13 children, who each had 13 children, who each had 13 children, who each had 13 children, who each had 13 children. Everyone on the picnic took one hotdog and ate it. How many hotdogs were there?
Riddle: A magician claims to be able to throw a ping pong ball a short distance and it will come back to him. He adds that he will not bounce it off anything nor tie anything to it nor have it caught and thrown back. How will he do this?