There was a man who went to the mall where he bought 3 pairs of red socks and 3 pairs of white socks. Another man who had already bought 3 pairs of red socks and 3 pairs of white socks was on the way back to return his 6 pairs of socks. They were both blind.
As they were walking, they bumped into each other. All the socks scattered around the floor, but each pair remained held together by a rubber band. Nobody helped them pick the socks up, but in 3 minutes they both had 3 pairs of red, and 3 pairs of white. How is that possible if they are blind?
Each man took 6 pairs of socks. Then from every pair, they would give the other man 1 sock. They kept doing this for all 12 pairs of socks.
This logic will only work if you have an equal number of red socks and white socks.