[X]

Privacy Policy + T&C

We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.

[X]

Common Answers

Have you entered August's Common Answers?

BB Logo Spacer
Spacer
Line
Line

Puzzle - Rate

There is a closed room with a light in it. Outside, there are 3 light switches.

You can flick any of the switches any number of times.

You can only open the door and go into the room once.

You know that the light is initially off and you can't see what happens when you flick the switches.

How can you determine which light switch operates the light?

[Ref: ZKIC]

1 Star 2 Stars 3 Stars 4 Stars 5 Stars

Back to the puzzles...

 

 



This website uses cookies, for more information please view our privacy policy. By using the site you also agree to our terms and conditions.

Line
Line