Q. Two fathers and two sons went fishing. Each caught exactly one fish and yet there were only three fish caught. Why?

Ans. This is a classic in creative thinking. Many problems are set up to get you to expect one thing and then shock you be having the obvious be false. At first we think that two fathers and two sons means four people. But each caught a fish and yet only three fish were caught. Hence, there were only three people. How could that be? It must be that one of the three people fulfills a dual role of being both a father and a son. Is that possible? Of course. So it must have been a grandfather, a father and his son who went fishing.