There were 2 fathers and 2 sons, they all went fishing and each caught 1 fish. When they looked at all the fish caught, there were 3 fish in all.
How could this be?
There were 3 men in all. The 1st man was a father and a grandfather. The 2nd man was the son of the 1st man and father of the 3rd man. That means the 1st man counted as 1 father,the 2nd man counted as 1 father and 1 son, the 3rd man counted as 1 son therefore there were 2 fathers and 2 sons.