Once, a guy from Africa went to America. While passing through a road he saw a very high building. He was amazed to see it, and decided to count its storeys. As he was doing so a townsman saw him and tried to befool him. So he approached the guy and asked, “What are you doing?” When he told the answer, the townsman said that one had to pay two dollars for every storey counted. “How many have you counted?” The guy said ten and gave the man twenty dollars. Walking away, the guy was very happy to think how he has befooled the other man for he had counted twenty.