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Old 09-02-2008, 08:10 PM   #1
ravenguy2000
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Question So there's three switches

at the end of a hallway. At the other end of the hallway is a room with door. The door is closed. Inside the room is a lamp which is manipulated by one of the three switches.

You can turn the switches on and off. You can walk down to the other end of the hallway, open the door, and go in the room, but when you return you have to close the door behind you. You can only make the trip once.

How do you determine which switch is connected to the lamp?

 
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Old 09-02-2008, 08:12 PM   #2
Nimrod's Son
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Is the goal to get into the room with the lamp on, or simply to determine which switch works?

 
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Old 09-02-2008, 08:13 PM   #3
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Also I would just look for the ambient light from beneath the door crack. It doesn't take math to solve this.

 
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Old 09-02-2008, 08:13 PM   #4
???
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check the lamp room first, if the light is off then at least one of the switches will be the right one.

 
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Old 09-02-2008, 08:13 PM   #5
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You just need to determine which switch works.

 
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Old 09-02-2008, 08:15 PM   #6
???
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del

 
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Old 09-02-2008, 08:16 PM   #7
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run the lamp cord under the door and take it with you. then you can see the lamp from the end of the hall and once you saw it, take the saw and cut the wall open to look at the wiring

 
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Old 09-02-2008, 08:17 PM   #8
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I turn two of the light switches on.
I wait a little bit.
I turn one of them off.
I enter the room.
If it's dark, I gently fondle the light bulb.
Et voilá!

 
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Old 09-02-2008, 08:18 PM   #9
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why you gotta go and make things so complicated?

 
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Old 09-02-2008, 08:51 PM   #10
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Quote:
Originally Posted by antipop View Post
I turn two of the light switches on.
I wait a little bit.
I turn one of them off.
I enter the room.
If it's dark, I gently fondle the light bulb.
Et voilá!


I was thinking of this too, but if it’s warm, how do you know which of the two switches it was, if you can only make one trip?

 
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Old 09-02-2008, 08:53 PM   #11
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Quote:
Originally Posted by barden View Post
I was thinking of this too, but if it’s warm, how do you know which of the two switches it was, if you can only make one trip?
because if it is the one you haven't switched off, the light will be still on.

 
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Old 09-02-2008, 08:59 PM   #12
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it all makes sense.
hooray!

 
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Old 09-02-2008, 09:09 PM   #13
???
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well now i'll know exactly what to do if i'm ever in this extremely unlikely situation.

 
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Old 09-02-2008, 09:14 PM   #14
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BTW: I dont know any lamps that run off any wall switches guys.
Get your facts together dammit!

 
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Old 09-02-2008, 09:20 PM   #15
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Quote:
Originally Posted by barden View Post
BTW: I dont know any lamps that run off any wall switches guys.
Get your facts together dammit!
What?

 
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Old 09-02-2008, 09:25 PM   #16
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I figure this is a good as a place as many to admit it. I have a sick habit. When nobody is around or watching, I draw up electrical schematics and make up my own little circuits with resistors and cute little bulbs and everything. Afterwards I stuff the heavily drawn-on piece of paper down my throat and get rid of the evidence. I am so ashamed ;_;

 
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Old 09-02-2008, 09:26 PM   #17
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that's so adorable, bonnie

 
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Old 09-02-2008, 09:27 PM   #18
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Quote:
Originally Posted by antipop View Post
What?
Well, the power points have switches so I guess I lied

 
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Old 09-03-2008, 01:15 AM   #19
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Quote:
Originally Posted by ohnoitsbonnie View Post
I figure this is a good as a place as many to admit it. I have a sick habit. When nobody is around or watching, I draw up electrical schematics and make up my own little circuits with resistors and cute little bulbs and everything. Afterwards I stuff the heavily drawn-on piece of paper down my throat and get rid of the evidence. I am so ashamed ;_;
you're a robot

 
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Old 09-03-2008, 01:15 AM   #20
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Hi

 
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Old 09-03-2008, 01:18 AM   #21
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i'm sorry i don't fraternize with robots

 
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Old 09-03-2008, 01:21 AM   #22
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just kidding. i've always wanted a robot. you can make me tropical drinks and push my hammock when it stops rocking

 
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Old 09-03-2008, 01:23 AM   #23
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..but but I made you something
http://img297.imageshack.us/img297/563/formistleac1.png

 
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Old 09-03-2008, 01:24 AM   #24
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It's not very complex, but it is the thought that counts with you humans, right?

 
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Old 09-03-2008, 01:24 AM   #25
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just kidding. i've always wanted a robot friend. we can ride around on bicycles and make jokes about people and if anybody wants to fight you can zap them with your lazer eyes

 
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Old 09-03-2008, 01:25 AM   #26
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The lazer eyes only comes with the luxury model and I am merely the standard

 
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Old 09-03-2008, 01:26 AM   #27
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Quote:
Originally Posted by ohnoitsbonnie View Post
thanks

what does it do though? i didn't pay attention when they tought us this in school

 
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Old 09-03-2008, 01:27 AM   #28
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It is a light that symbolizes our burning passions ;_;

 
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Old 09-03-2008, 01:28 AM   #29
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Most of all it's just the simplest series circuit with a switch ever

 
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Old 09-03-2008, 01:31 AM   #30
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