A psychiatrist in a mental hospital decided to test three patients to determine if they were well enough to be released.

He asked the first one: What is 3 times 3?

The patient answered: 111.

He asked the same question of the second patient and was told that the answer was Tuesday.

He told both that they werent healed and had to stay.

He asked the third one: What is 3 times 3?

The reply: 9.

Great!!! Youre cured! You can go home, but tell me how you knew the answer?

The patient replied: Simple. I divided 111 by Tuesday!