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One Trip to the Attic? (Math Chat)

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Visit this site: http://www.maa.org/features/mathchat/mathchat_11_5_98.html
Author:Frank Morgan, MAA Online
Description: In the lobby of a hotel there are three on/off switches. One is attached to a light bulb on the third floor; the other two are attached to nothing at all. You may work the three switches as often as you please. How many times do you need to visit the third floor to determine which switch is attached to the light bulb?
Levels: Middle School (6-8), High School (9-12)
Languages: English
Resource Types: Problems/Puzzles, Articles
Math Topics: Logic/Foundations

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