Riddle #442

Question: There are 4 light bulbs in a room and 4 switches corresponding to these four light bulbs (in a random order). You cannot see the light bulbs from where the switches are.

If you can only visit the room with the light bulbs once, how can you figure out which switch belongs to which light bulb?

Riddle Discussion

By: Bandanaman on 29/6/14

It is sad that, soon, this riddle will have no answer as LED bulbs become more and more commonplace.

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