Try to guess it

+8 votes
810 views
asked Jun 18, 2013 in Challenge / Quizzes by Cupcake549 (31,880 points)
In the basement there are 3 light switches in the "off position." Each switch controls one of three light bulbs on the floor above. You may turn on any of the switches, but you may only go up stairs one time to see which light(s) were affected. How can you determine which switch controls each particular light bulb?


1 Answer

+1 vote
answered Jun 19, 2013 by mathgeek36 (41,110 points)
selected Jun 19, 2013 by Cupcake549
 
Best answer
Turn the first switch on and wait 5 minutes. Then turn the second switch on and wait 5 minutes. Then turn the third switch on and wait five minutes. You go upstairs to the other room, the bulb that is warm is operated by the first switch, the roasting hot bulb (that would burn your hand) is operated by the second switch, and the cold bulb is operated by the third switch.

My friend asked me this on a camping trip, and I would have never guessed the answer!

Great question!!
commented Jun 19, 2013 by Cupcake549 (31,880 points)
Thank you! You did great

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