You have 3 switches outside a closed room. Inside the room is one light bulb, and only one switch controls it.
* You can enter the room only once.
* You can turn the switches ON or OFF, but you cannot turn all three switches ON at the same time.
* You cannot see the bulb from outside the room.
How can you identify which switch controls the bulb?
No cheating! Let's see who can crack this tricky challenge!

* You can enter the room only once.
* You can turn the switches ON or OFF, but you cannot turn all three switches ON at the same time.
* You cannot see the bulb from outside the room.
How can you identify which switch controls the bulb?
No cheating! Let's see who can crack this tricky challenge!
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