Riddle: There once lived a serial killer who word kidnap his victims before killing them. When they got to his lair,both the sereal killer and the victim would have a glass of water and a pill. The sereal killer stated that one of the pills was harmless and one of them would kill the victim. He would let the victim chose first. They both had the water and the pill in one. But after years of doing it, the serial killer never died. How is this possible?
Answer: Beforehand, the serial killer would poison the victims water but not his own. Both the pills were completely harmless.
