Think out of the box!
2 rooms, 1 light bulb in one room and the other room has 3 switches out of which only one of the light bulb switches on/off. The rooms are not viewable from each other. You as a single person has just one chance to find which switch operates the bulb. How can this be done?
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2 comments:
This is how a camera may be described!
Flip 2 switches, leave on a minute, then flip one of them back. Now you have 3 possibilities: lightbulb is either off, on, or off but warm (b/c it was on), and so you know which switch gave it that state.
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