Three patients at a psychiatric clinic are up for release. The shrink informs them that they will have to pass a simple test. Asking the first patient:

Q. How much is two plus two?
A: Blue.

At which the kind doctor calls in the orderly to escort the patient back to his room.

Turning to the second patient, he asks what is six minus three? To which the patient replies: Square. Once again the orderly is called in to remove the patient. Turning to the third and last patient, he asks, "How much is five plus five?" The patient answers very confidentally: Ten. The doctor, amazed then inquires how did you figure it out? The patient: "Easy.Blue multiplied by square equals ten."