Problem of the Day
A new programming or logic puzzle every Mon-Fri

Three Light Switches

You are placed in a room with three light switches. The light switches each map to a light bulb in a room which you can not see in to. You're only allowed to enter the room with the light bulbs once. How do you figure out which switch maps to which light bulb?

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Permalink: http://problemotd.com/problem/three-light-switches/

Comments:

  • Opetich - 8¬†years ago

    Turn 1 light wait like 5 min turn it off.
    Turn another light switch and enter the room.
    Check which one is hot, that one was the first switch, the light on is the last switch you clicked and the other is the one you never clicked :)

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