Originally Posted by Andy

I talked to an old professor at my school and he said when he interviewed for a job he got they had him sit in a room and had each member of the company come in individually and ask him a question/riddle. They used this to base his reaction to strange problems and situations (see how you think and work when challanged). He told us one of the questions they asked him was this. Your in a house with that's wired wrong. Upstairs there are 3 switches, downstairs there are 3 bulbs. How can you tell which switch controls which bulb without making multiple trips and without anyone else around. His solution was to turn 2 switches on for a minute, then turn one off and go downstairs. The bulb that's still on is obviously the switch that's still on. The bulb that's still warm is the one that was on but got turned off and the bulb that's off and cold is the switch you didn't touch.

He said they told him after he was hired that he figured out 9 of the 10 things they asked him and did the best of anyone they had ever interviewed. It's strange but I guess some companies do things like that.