Imagine you are in a room with 3 switches. In an adjacent room there are 3 bulbs (all are off at the moment), each switch belongs to one bulb. It is impossible to see from one room to another. How can you find out which switch belongs to which bulb, if you may enter the room with the bulbs only once?
2007-01-03 23:26:48 · 16 answers · asked by destiny_alight 1 in Entertainment & Music ➔ Jokes & Riddles
you can only go in once remember!!!!
Comeon someone must know the answer im in a competition here lol
2007-01-03 23:47:25 · update #1
Turn one of the lights on and leave it a few minutes, then turn it off and turn another one on. Go into the room, the one you switched on first will be off but hot, the second one will be lit and the third will be off and cold.
2007-01-03 23:36:21 · answer #1 · answered by agius1520 6 · 3⤊ 1⤋
By turning the light on, heat will be created. Out of the three switches turn 2 of them on. Leave Them on for 5-10 min then turn only one of them off. When you go into the room, one light will be on, one light bulb will be hot, the remaining bulb will be cool. There you have it.
ps-nice one Agius , G.M., and Chris! You edited your answers after I solved the problem! I know because no one had solved it at the time I posted my answer!
2007-01-04 08:00:44 · answer #2 · answered by Sherry 3 · 2⤊ 0⤋
Switch on one light and leave it on, you then know which switch this is because the light will be on when you enter the room. switch on another for 30 secs then switch off. go into the room and feel the two unlit bulbs
switch 1 already on
switch 2 hot bulb
switch 3 cold bulb
2007-01-04 07:40:21 · answer #3 · answered by Anonymous · 3⤊ 1⤋
Turn on 1 switch on. go to the door of the other Room but don't enter..see which bulb is on..then do the same thing for the other..then you'll know..you don't even need to go into the room.
2007-01-04 07:42:23 · answer #4 · answered by Ronnie 3 · 0⤊ 1⤋
With the cunning use of a mirror. Or turn one one, go in and then you know which one that is, but while your in there smash the glass on one of the other two and go back to your room and try the remaining two switches. The power should trip out in your own room when your hit the one connected to the busted bulb, provided its on the same ring circuit!
2007-01-04 07:40:04 · answer #5 · answered by Anonymous · 0⤊ 1⤋
turn the switches on and off and then feel which bulbs get hot
2007-01-04 09:03:56 · answer #6 · answered by markhatter 6 · 0⤊ 0⤋
Can you just turn on 2 switches?
2007-01-04 07:56:46 · answer #7 · answered by Kizzy_ 5 · 0⤊ 0⤋
flick the switches on in 30sec periods ::turn off at the same time ,go in and feel the bulbs hotest to the coolest
2007-01-04 07:31:57 · answer #8 · answered by Anonymous · 5⤊ 0⤋
the adjoining wall is made of glass, therefore you can see what is happening in the other room
2007-01-04 07:32:32 · answer #9 · answered by Peter H 3 · 0⤊ 1⤋
Buy a torch, it's easier
2007-01-04 07:28:10 · answer #10 · answered by Anonymous · 0⤊ 0⤋