Dr. Smith recently got his doctorate in psychology and his first assignment was to visit the community  retirement home for the patient's monthly mental examination.

He sees his first patient and asks him, "Ralph, how much is six times six?" Ralph responds "74." He asks the next resident, "Tim, how much is six times six?" Tom responds, "Thursday." Expecting more of the same, he approaches Randy and asks him, "Randy, how much is six times?" "THIRTY-SIX" replies Randy. "That's right Randy, well done! Now tell me how did you know that answer?" "Oh it was easy... I just subtracted 74 from Thursday!"