Topic: Puzzle

+ Puzzle
From	Message
Damo 28 Dec 02, 16:53	+ Puzzle Ok here's a challenge for you all. Let's see who can solve it first. It is not a trick - there is a real answer to this. You can ask me questions if you need to. There is a room with a light in it. There are no windows and the one door is totally sealed to light. From the outside it is impossible to see whether the light is on or off. You are outside and there are 3 light switches (labelled A, B and C). Only one of them turns the light on - the other two do nothing. The door is closed. You can turn the switches on and off as many times as you like whilst the door is closed but once you open the door you can't touch the switches. (You can't close the door again to have another try at the switches.) Your task is to work out which one of the 3 switches operates the light. Don't forget once you open the door to look your go is over.
VALLEY 28 Dec 02, 17:22	+ Puzzle If one of your friends stands inside the room with a mobile phone ready, you can switch off the lights one by one & ask him which one switches the light off.
Damo 28 Dec 02, 17:48	+ Puzzle Very good - but I'm afraid not. You're on your own for this one.
Jon 28 Dec 02, 21:01	+ Puzzle Can't you just turn all of the switches on and that guarentees that you turn the light on which is the whole point of a light switch?!?!?!
VALLEY 28 Dec 02, 22:09	+ Puzzle Yes but the idea is to find out which light switch turns the light on
spookylukey 28 Dec 02, 22:46	+ Puzzle OK: Assuming all the switches are off initially: you turn switch A on, and leave it on for 1 minute. Then turn it off, and turn switch B on. Open the door straight away. If the light it on, it is switch B (obviously) If the light is off, but you touch the bulb and it is warm, it is switch A. If the light is off and the bulb is cold, then it is switch C. Is that allowed?
Jon 29 Dec 02, 15:37	+ Puzzle Luke you make us look like minions in a world of cotton buds! Hummmm I might have to promote you to Vice Boy of Destiny!
Sweetmadness 29 Dec 02, 16:19	+ Puzzle i was thinking along the lines of feeling the light switch to c if it gets hot.....but they don't do they....oh well the thougth was there somewhere...
Damo 30 Dec 02, 21:44	+ Puzzle Well done Luke - did you work that out yourself or have you heard it before?
spookylukey 01 Jan 03, 22:57	+ Puzzle I worked it out. The thing you said about turning lights on and off gave me the clue - what are the side effects of turning a light on and then off again.
Rich_Rocks 01 Jan 03, 17:14	+ Puzzle OH I KNEW THAT!!!!!!!!! LUKE YOU.......... ANNOYIGN PERSON YOU!!!!!! our lit teacher gives us one every lesson
Jon 01 Jan 03, 18:46	+ Puzzle obviously spelling tests go amiss
Beth 05 Jan 03, 18:14	+ Puzzle I knew that too only i know a different version where there are 3 light bulbs and 3 switches..........
Jon 06 Jan 03, 17:52	+ Puzzle So it's pretty much the same?
VALLEY 08 Jan 03, 13:54	+ Puzzle soundz like it 2 me