Clue - The answer may be not serious.
Clue - The answer may be not serious.
Here's a brain teaser, and it was an SAT question. Think about it, but it's tricky.
You're in a house, absolutely nothing is in the house besides you, a downstairs square room, and then a staircase leading upstairs to an identical square room with only a lightbulb at the ceiling and nothing else.
There are 3 lightswitches on the wall downstairs that control the lightbulb upstairs. If you are only allowed to move away from the switches to go upstairs and check ONCE to see what switch turns the light on, how do you figure it out?
And before anyone asks, you don't just guess, you cannot see the light shining down the steps, and you can't trick anyone and go up more the once.
are the light switches dimmers?
No, they're regular light switches.
Do the 2 switches that don't turn on the light upstairs switch on any lights downstairs?
If so. You wait until you see which switches turn on lights downstairs and when 2 lights are lit by process of elimination you know that the remaining switch must turn on the light, upstairs.
There is no feasible answer.
You have three switches. You only have one trip. It's impossible.
The answer has to be some stupid explanation like "Go Outside and look at a window" or some crazy shit. There's no reasonable answer like "turn on the middle and left switch, go upstairs, then come back down". There's no way to do it.
BUT...
If there is, PM me the answer.....
It's not impossible at all.
You turn the first switch on for about ten minutes or so and then turn it off.
Then you turn the second switch on.
Go upstairs.
If the light is on, then the second switch is the right one.
If the lightbulb is off and hot, it is the first switch.
If the lightbulb is off and cold, it is the third switch.
Last edited by greebull; April 28th, 2006 at 1:34 AM.
Gangsta. That is 100% correct.Originally Posted by greebull