Posted by JohnX2 on May 9, 2002, at 19:18:54
In reply to 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
>
>
> JohnAlso, the lightbulbs are initially off (as well as
the corresponding levers).And, you can walk into the room.
John
poster:JohnX2
thread:23447
URL: http://www.dr-bob.org/babble/social/20020509/msgs/23448.html