A Quiz: Lightbulb switches

Posted by JohnX2 on May 9, 2002, at 19:11:41

Inside a room there are 4 lamps sitting on a table (A-D).
Outside the room there are 4 levers (1-4).
Each lever can turn on or off one of the lamps (i.e.
when all 4 levers are on all 4 light bulbs will be on).
There is a closed door to the room (seperating the levers
from the lamps).
You can turn on the levers in any position you want (on/off),
and then open the door to observe the lamps (which ones
are on).
Your goal is to figure out which lever control which lamp.
*Caveat*: You have only *2* trials to change the levers and then
observe the behavior of the lamps in the room.
How do you solve the problem?
(If you've heard this before, hold the answer to your chest).

------------------------------------
Inside room:
Lamp-A Lamp-B Lamp-C Lamp-D
--Door---------------------------------
outside room:
Lever-1 Lever-2 Lever-3 Lever-4

John

Thread

A Quiz: Lightbulb switches JohnX2 5/9/02
Re: A Quiz: Lightbulb switches JohnX2 5/9/02
Who's in charge of handing out the prizes? » JohnX2 Ron Hill 5/9/02
Re: Who's in charge of handing out the prizes? » Ron Hill JohnX2 5/9/02
holding it to my chest =heard before (nm) CtrlAlt n Del 5/9/02
Re: Pass the ibuprofen. (nm) » JohnX2 Zo 5/10/02
skip the ib. pass the ulcer. (nm) » Zo beardedlady 5/10/02
hint: 98.6 (nm) JohnX2 5/10/02
hint 2 JohnX2 5/10/02
Re: Who's in charge of handing out the prizes? » Ron Hill JohnX2 5/10/02
Manda's attempt at brilliance-- Ha! Manda 5/11/02
Re: Manda is brilliant! » Manda JohnX2 5/11/02
Re: My Solution to Lights and Switches » JohnX2 Ron Hill 5/11/02
Re: Ron is Einstein » Ron Hill JohnX2 5/12/02

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