Clicks and Giggles: Riddle Me This
- Thread starter Spinwhiz
- Start date
If the guru is only addressing a portion of the islanders, and that portion may only have one person with blue eyes in it, all the people there will be able to deduce instantly their eye colour and leave that night. The following day the 99 remaining blue eyed people will realize that they can see no people with brown eyes, and knowing that one blue eyed person left the night prior, they will conclude that the remaining mass, including them and excluding the guru, have blue eyes. The guru has no idea what clour eyes she has, so she will be left on the island forever
Also ARRRGH. Just found an AWESOME answer on Yahoo! Answers, and it makes so much more sense than mine, even if it is a bit harder to wrap your head around
The Guru lines everyone up before speaking, so that all the blue eyed people are facing one direction, and all the brown eyed people are facing the other, and they alternate. So people with blue eyes can only see people with brown eyes, and people with brown eyes can only see people with blue eyes. The guru is looking in the same direction as the people with brown eyes are looking, so she can only see people with blue eyes.
When the Guru says she can see someone with blue eyes, all the people with brown eyes will know that she has oriented people a certain way, and will look at each other and see that all they can see are people with brown eyes, will know they have brown eyes, and will leave, as will the person the Guru was talking directly to. The next day, the remaining 99 people will look at each other and notice that they all have blue eyes, and they will leave. The Guru will remain forever.
When the Guru says she can see someone with blue eyes, all the people with brown eyes will know that she has oriented people a certain way, and will look at each other and see that all they can see are people with brown eyes, will know they have brown eyes, and will leave, as will the person the Guru was talking directly to. The next day, the remaining 99 people will look at each other and notice that they all have blue eyes, and they will leave. The Guru will remain forever.
All the people with blue eyes would know they had blue eyes because everyone else would look at them. So they would leave first. Right? Idunno seems like it.
Can I take another stab at it?
Writing it our is going to take forever, and I can't really explain it properly, so i'm just going to be a bad mathematician and say 100 blues leave on the 200th night, and 100 browns leave on the 300th
Writing it our is going to take forever, and I can't really explain it properly, so i'm just going to be a bad mathematician and say 100 blues leave on the 200th night, and 100 browns leave on the 300th
Just a shot in the dark here, but seeing as they are on an island, could they all not just look at they're reflection in the water?
That's the right answer. And all the brown-eyed people leave the next day...sorry I didn't post this earlier guys...my internet was down for a bit.treeboy027 said: