Blue Eyes: Logic Puzzle

Post by **Jonathan** » Tue Mar 11, 2008 4:58 pm

http://xkcd.com/blue_eyes.html

I took approximately thirty minutes to figure it out last night before I fell asleep. In this case I believe "logic" is a misnomer. It's a math puzzle.

quantus · Post by **quantus** » Tue Mar 11, 2008 7:04 pm

I think that everyone with Blue Eyes could leave, but I can't see how anyone else would ever know the color of their eyes. That's my 30 second answer.

Post by **Jonathan** » Mon Mar 17, 2008 9:45 pm

**** SPOILER ****

To put it words that do not easily jump out to the person who does not want to be spoiled and find out that the result you have produced is mostly appropriate, I ask, "But which night?"

Dave · Post by **Dave** » Mon Mar 17, 2008 10:14 pm

I guessed everyone would leave on the 200th day!

George · Post by **George** » Tue Mar 18, 2008 12:56 am

I concur with Dave. After 199 days, everyone spontaneously gouges out their left eye.