At the bottom of the Attic stairs there are 3 light switches.
In the Attic room there are 3 corresponding lights.
You can flip the switches on and off as many times as you like and leave them in any position.
However, you can enter the Attic only once.
How do you determine which switch works which light?
Last updated on 1 January 2012
Copyright: R J Moore 2008-2012 all rights reserved.