Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
Answer:
Pour one of the glasses of milk into an empty glass.
She killed her sister in hopes that the man would be at the funeral. Some people say this riddle is a test of a psychopath. If you answer it correctly, you could be one.