Mind Masher #3

In Mind Games on November 2, 2006 at 10:25 am

bulb.jpgHere’s another, slightly more difficult Mind Masher for the series:

There are three light bulbs in in one room. Adjacent is another room with three switches; each switch operates one light bulb. The bulbs cannot be seen from the room with the switches. How can you find out which switch operates each bulb if you can only enter the room with the light bulbs once?

Answers below, or by Email.

  1. turn 2 switches, leave them on for 5 min. then turn 1 off. go in the room. one bulb will be on, the bulb you turned off will be hot and the 1 you didnt turn on will be off and cold.

  2. Brady, you are right! Perhaps it was a bit easy…

    In a few days, there will be a new site feature you may be interested in. I’ll post about it as soon as it’s ready… 😉

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