3lightbulbs
Published: Nov 30, 1999
Riddle: There are 3light bulbs in a house, and there's no way to see them except through the door. The light switches are outside the house. How can you find out by yourself which switch turns on which light bulb?
Answer: You turn on one switch and wait for an hour. Then you turn it off and turn the second switch and go in and feel the three light bulbs. The hot one is related to the first switch. The glowing one is related to the second whitch, and the cold one is related to the last switch.
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