Brain Teasers
Brain Teasers Trivia Mentalrobics Games Community
Personal Links
Your Friends
More Community
Teaser Comments
Trivia Comments

User Rankings
Search for User
Add to Google delicious Add to

More ways to get Braingle...

Braingle Time
11:14 am

Usenet Newsgroups : rec.puzzles Hall of Fame

The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

Many of these puzzles also appear in Braingle's own collection.

Hall of Fame
Categories : real-life : three.switches.p

A lightbulb is turned on by one of three switches, but you cannot see
the bulb from the switches.  How can you determine which switch turns
on the bulb if you only want to go from the switches to the bulb once?

Assume that the switches are clearly marked indicating which
orientation is on, that the lightbulb is an ordinary household
incandescent bulb, that you do not have assistants or apparatus such as
mirrors available, and in general that this is not a trick question.

Can you solve it for four switches?


Users in Chat : None 

Online Now: 12 users and 683 guests

Copyright © 1999-2014 | Updates | FAQ | RSS | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise

Custom Search

Sign In A Create a free account