THREE LIGHT SWITCHES

 

There are three switches in a hallway. One switch controls a light fixture in a room at the far end of the hall. The door to the room is closed, and you can’t see whether the light is on or off. You need to find out which of the three switches controls the light. You are allowed only one inspection. How can you be certain of finding out which switch controls the light?


THREE LIGHT SWITCHES

 




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