Originally Posted by Mr. X
He's one to get you thinking...
You are standing in front of a room with one lightbulb inside of it. You cannot see if it is on or off. Outside the room there are 3 switches in the off positions. You may turn the switches any way you want to. You stop turning the switches, enter the room and know which switch controls the lightbulb. How?
I think I solved the problem! First, u turn switch #1 on! Let it be a few mins, and than, u turn it off! Than u turn switch #2 on and enter the room! Now, if lightbulb is on, than it's switch #2, cuz all other switches r off! If it's still off, than u approach the lightbulb and touch it, and if it's worm, than it's switch #1 cuz it was on for few mins and lightbulb got hot from heat of light, and if it's not hot, than the only switch left is #3, and it must be that one than!
^^ Little bad english, but I think I got point!