There is a round room, and the only thing in it is the light, which is located in the middle of the celling. There is only one door into this room. and light cannot pass through this doorway. Outside of the room there is a hallway with three light switches. One of these switches will turn the light in the room on, the others will not.
Now you can only go into the room to see the light once.
You need to find out WHICH switch turns the light on. and like I said light does not go in out out of the doorway, and you can only look in once. How do you figure out which switch is the switch for the light in the room. Good luck.
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