Three Lightbulbs

Puzzle number 23. Submitted by rparnell.

You are in a room in a building. There are only two rooms in the building, and there are no windows in either room. The room you are in has three switches, which operate three light bulbs in the other room.

You need to deduce which switch operates which light bulb. You may only enter the other room once. How is this possible?

All original content is © Ali Rout & Rupe Parnell (Starsol.co.uk) 2004 - 2005. Zuzzle.com is maintained by Starsol.co.uk, the creators of websites for Skegness and Mevagissey. This website is best viewed using a screen resolution of at least 800 * 600 pixels (1024 * 768 recommended), in a maximised browser window. Usage of this website is subject to agreement of our terms and conditions of usage.