Fishing For The Answer
Riddle: Two fathers and two sons go fishing. Every person catches a fish and comes back with it. They come back with three fish. How is this possible?
Answer: One is a son, one is a father to the son and a son to his son's grandfather. The grand father is a father. 2 fathers ( grandfather and father)+2 sons (grand son and father)= 3 people. Try put this math trick on your teacher!
Source: https://www.riddles.com/4747
