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 Light bulb (Posted on 2002-05-16)
A light bulb is hanging in a room. Outside of the room there are three switches, of which only one is connected to the lamp. In the starting situation, all switches are off and the bulb is not lit.

You are allowed to enter the room only once (the bulb is not visible from outside). How can you determine which of the three switches turns on the light bulb?

 Subject Author Date Puzzle Solution K Sengupta 2022-01-09 07:02:53 what about an assistant? Pedro Felipe 2007-11-23 01:28:38 amazing !!! assaf 2007-01-13 11:09:18 4 switches? Andre 2005-09-02 18:00:52 Solution... Kind of... Stephen Ticsay 2005-04-15 01:37:27 I got it! Lisa 2004-04-21 09:36:13 re: A Funny Soultion logischer Verstand 2004-04-13 17:21:13 my way logischer Verstand 2004-04-13 17:18:23 An interesting way Allison Smetana 2003-04-28 11:08:08 solution nas 2003-01-14 07:31:37 HEY,MEL!YOU LOOKED AT THE SOULTION TO THE PROBLEM YOU CHEATER! Megan 2002-09-07 14:47:41 A Funny Soultion Megan 2002-09-07 10:27:30 i know the answer! hehehe i smart Mel 2002-08-22 11:44:08 only 1 bulb Sean 2002-05-26 07:29:50 duh!! theBal 2002-05-17 09:49:19 Solution page410 2002-05-17 07:32:13 easy theBal 2002-05-16 07:33:30

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