You are in a room with 3 switches which correspond to 3 bulbs in another room and you don't know which switch corresponds to which bulb. You can only teleport to the room with the bulbs and back once. You can NOT use any external equipment (power supplies, resistors, etc.). How do you find out which bulb corresponds to which switch? I found two answers to this one I am sure there are a ton more. Oh and no making up dumb stuff like saying the wires connecting the switches and bulbs are all differant colors and then using that to get your answer.