(Close Window)
Topic: Which switch activates the light?
Message: Posted by: The Hitchhiker (Apr 27, 2007 10:48AM)
I have a real life puzzle for you, first let me describe the area of event.

1. There is a room which has no windows and only one door.
2. There is a light in the centre of the ceiling, (lampshade/bulb)
3. Outside the room there are 3 switches A, B and C, you cannot see them from inside
4. You can position the switches any way you wish
5. You enter the room only ONCE and must stay inside untill you correctly answer
6. You are on your own with no assistance in any way

Starting at the switches, A is off ,B is off, C is off.

Which switch activates the light? well ill give a little clue, it could be any of them, so the question really is how would you work it out!

Have fun.
Message: Posted by: Jonathan Townsend (Apr 27, 2007 12:57PM)
I can think of a way that would work with incandescent bulbs and another that would work with fluorescent bulbs. Does the investigator know which it is?
Message: Posted by: The Hitchhiker (Apr 27, 2007 05:07PM)
Just an ordinary filament bulb.
Message: Posted by: Edith (Apr 27, 2007 05:27PM)
Hahaha it's an old classic...
Message: Posted by: Slim King (Apr 29, 2007 09:28PM)
What are the rules?
Do you get to switch the switches?
Message: Posted by: The Hitchhiker (Apr 30, 2007 03:42PM)
Start at the switches, flick the switches on/off any way you wish, enter the room when you are ready to do so, advise which switch activated the light and the method you used to work it out.
Message: Posted by: Philemon Vanderbeck (Apr 30, 2007 04:00PM)
CLUE: What does a light bulb produce besides light?
Message: Posted by: Slim King (Apr 30, 2007 07:16PM)
I have the answer....are we supposed to tell?
Seattle guys would get this right away :)
Message: Posted by: flobiwan (May 7, 2007 11:50AM)
PM'd you.

Message: Posted by: magicgeorge (May 10, 2007 06:56AM)
I think everyone knows but doesn't want to spoil it for anyone who doesn't!

I'd never thought about flourescent bulbs and am interested in what Mr Townsend's solution for them is.

Real life puzzle? Can anyone think of any reason for rule 5 to be appropriate in a real life situation?

Message: Posted by: 0pus (May 14, 2007 01:57PM)

You are really lazy?

Message: Posted by: The Mighty Fool (May 16, 2007 01:14AM)
If you turned on two switchs & left them on awhile, then turned one off & touched the bulb, that would tell you right?
Message: Posted by: elmago (May 16, 2007 04:02AM)
I know the method for flourecent lights. Its the same, you just have to wait longer, say an hour as opposed to a filament where a minute should suffice.

As for rule #5 in real life situations, maybe not. But movie situations like Saw, Saw 2, and Saw 3, are life death puzzles. Come to think of it, how many movies are out there where people are forced to solve puzzles to save their lives. Every episode of Batman fighting the Riddler has this.

Message: Posted by: elmago (May 16, 2007 04:06AM)
On 2007-05-16 02:14, The Mighty Fool wrote:
If you turned on two switchs & left them on awhile, then turned one off & touched the bulb, that would tell you right?
Yes and No. You turn on one switch for a while, turn it off. Then you switch on the second switch and leave it on. You do not even touch the third switch. Walk into the room and you will have all the information you need to solve the puzzle.
Message: Posted by: Dave V (May 21, 2007 06:40PM)
That pretty much sums up what elmago said, doesn't it? One switch on, one switch on then off and one switch untouched. The timing is slightly different than his but the outcome should be the same.
Message: Posted by: Slim King (May 21, 2007 09:40PM)
One switch on for a long time....Turn it off and turn on the second switch and enter the room. That's all you need to do. You don't need to touch the third switch. :)
Message: Posted by: The Bean (Aug 9, 2007 04:15PM)
Oh YEA! Go Dad! I learned this one in 3rd grade! Yea! Everyone in seattle knows this one! Oh, and for George, what if you locked yourself in the room on accident, and had to wait for the police to get there, or maybe someone told you to do this puzzle in real life, wouldnt that practically make every puzzle "real life" possibe if that makes any sense!?

Message: Posted by: Slim King (Aug 9, 2007 04:57PM)
Hey Bean...when you gonna get a picture. I like the one on my phone :)
Message: Posted by: drkptrs1975 (Aug 23, 2007 07:12PM)
Don't go inside the room, keep the door open and watch if the light turns on when you flick the switch.
Message: Posted by: MagiClyde (Aug 24, 2007 01:41AM)
First, you get yourself a really large hammer. Then you take aim at the wall...! ;)