In one room, you have three ordinary incandescent lightbulbs (A, B, C).
In another room, you have three ordinary on-off switches (1,2,3).
Your goal is to figure out which switch controls which bulb.
You can spend as much time and energy as you want manipulating the switches, but you only get to go into the room with the lightbulbs ONCE.
(This is possible, but is not a straight logic puzzle.)
In another room, you have three ordinary on-off switches (1,2,3).
Your goal is to figure out which switch controls which bulb.
You can spend as much time and energy as you want manipulating the switches, but you only get to go into the room with the lightbulbs ONCE.
(This is possible, but is not a straight logic puzzle.)
posted by:
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Philadelphia
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Re: How many lightbulbs does it take to screw with your mind...
Thu, October 25, 2007 - 8:52 AMturn on switch #1 leave it on for 5 minutes, then throw switch #2
run to room.
Light bulb from switch one will be real hot.
Light bulb from switch 2 will not be as hot.
Light bulb from switch three will not be on.
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Re: How many lightbulbs does it take to screw with your mind...
Thu, October 25, 2007 - 9:08 AM
is it right?
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Re: How many lightbulbs does it take to screw with your mind...
Thu, October 25, 2007 - 10:37 AMYup. You got it.
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Re: How many lightbulbs does it take to screw with your mind...
Thu, October 25, 2007 - 10:38 AMOr you can turn one switch on, wait 5 minutes, turn it off, turn on another one, and then go to the room.
One bulb will be on.
One bulb will be off and hot
One bulb will be off and cold. -
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Re: How many lightbulbs does it take to screw with your mind...
Fri, October 26, 2007 - 10:37 AMeven better
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