The same guy has robbed the same bank three times in the last 30 days.
The FBI, in charge of preventing a fourth robbery ask the nervous bank teller, "Have you noticed anything in particular about the robber?"
"Yes," the teller replied. "I notice that each time he comes into the bank he's much better dressed."
An inmate at the local detention center was sitting in his cell playing solitaire. Another inmate was watching. Finally the kibitzer spoke up, "Wait a minute. I just caught you cheating yourself."
"Shhh! Don't tell anybody but for years I've been cheating at solitaire. "
"You don't say! Did you ever catch yourself cheating,?"
"Nah, I'm too clever."