| riddles. | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: riddles. Fri Apr 04, 2008 4:01 am | |
| anyome got any good riddles. all my friends have been stumped cuase i heard so much i think i remember them all.
here is one easy one.
i can run, but never walk
i have a mouth but cannot talk
i have a bed ut cannot sleep
tell me what am i? | |
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oligarch Chairman of the WR Committee
Posts : 1643 Join date : 2008-01-31
| Subject: Re: riddles. Fri Apr 04, 2008 4:03 am | |
| A river.
This is the hardest one in thew world but it only took me a few minutes.
A group of people with assorted eye colors live on an island. They are all perfect logicians -- if a conclusion can be logically deduced, they will do it instantly. No one knows the color of their eyes. Every night at midnight, a ferry stops at the island. If anyone has figured out the color of their own eyes, they [must] leave the island that midnight. Everyone can see everyone else at all times and keeps a count of the number of people they see with each eye color (excluding themselves), but they cannot otherwise communicate. Everyone on the island knows all the rules in this paragraph.
On this island there are 100 blue-eyed people, 100 brown-eyed people, and the Guru (she happens to have green eyes). So any given blue-eyed person can see 100 people with brown eyes and 99 people with blue eyes (and one with green), but that does not tell him his own eye color; as far as he knows the totals could be 101 brown and 99 blue. Or 100 brown, 99 blue, and he could have red eyes.
The Guru is allowed to speak once (let's say at noon), on one day in all their endless years on the island. Standing before the islanders, she says the following:
"I can see someone who has blue eyes."
Who leaves the island, and on what night?
There are no mirrors or reflecting surfaces, nothing dumb. It is not a trick question, and the answer is logical. It doesn't depend on tricky wording or anyone lying or guessing, and it doesn't involve people doing something silly like creating a sign language or doing genetics. The Guru is not making eye contact with anyone in particular; she's simply saying "I count at least one blue-eyed person on this island who isn't me."
And lastly, the answer is not "no one leaves." | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Fri Apr 04, 2008 4:07 am | |
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oligarch Chairman of the WR Committee
Posts : 1643 Join date : 2008-01-31
| Subject: Re: riddles. Fri Apr 04, 2008 4:08 am | |
| The riddle also asks on what night they leave. | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Fri Apr 04, 2008 4:12 am | |
| here is one.
what is only one color but not one size stuck at the botom yet easily flies is present in the sun but not in the rain does no harm, and feels no pain
and every night slim, a former criminal, took a wheelbarrow full of junk out of the place he works.(he is a garbage man at a construction house) every night the police checked the wheelbarrow to make sure he wasnt stealling anything and they never found one thing. the junk was not worth anything and the police saw what he stole. what was he stealing
and a man was laying dead with a hole in his heart. next to him was a puddle of water. how did he die | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Fri Apr 04, 2008 4:12 am | |
| ahh i see didnt get that. all of them leave one day after the other | |
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oligarch Chairman of the WR Committee
Posts : 1643 Join date : 2008-01-31
| Subject: Re: riddles. Fri Apr 04, 2008 4:22 am | |
| - environmentalist wrote:
- ahh i see didnt get that. all of them leave one day after the other
nope | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Fri Apr 04, 2008 4:25 am | |
| hmm do you mind if i take some time. this one really got me thinking i like it. byt hte way check out if yo can do mine. there pretty easy but oh well | |
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Ryom Senior Komsomol Member
Posts : 217 Join date : 2008-01-27 Age : 32 Location : The Fly On The Wall
| Subject: Re: riddles. Fri Apr 04, 2008 12:00 pm | |
| Jack and his dad is out driving, when Jacks dad suddenly looses control over the car and crashes. Jacks dad dies instantly but Jack is rushed to the hospital. at the big hospital Jack is having surgery, but then the surgeon says ¨I canot operate on him, because he is my son Jack¨ how can that be? | |
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Ryom Senior Komsomol Member
Posts : 217 Join date : 2008-01-27 Age : 32 Location : The Fly On The Wall
| Subject: Re: riddles. Fri Apr 04, 2008 12:03 pm | |
| - environmentalist wrote:
every night slim, a former criminal, took a wheelbarrow full of junk out of the place he works.(he is a garbage man at a construction house) every night the police checked the wheelbarrow to make sure he wasnt stealling anything and they never found one thing. the junk was not worth anything and the police saw what he stole. what was he stealing he is stealing wheelbarrows | |
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ilych Red Army Recruit
Posts : 278 Join date : 2008-02-01 Age : 31 Location : santa cruz, CA
| Subject: Re: riddles. Fri Apr 04, 2008 8:54 pm | |
| - Ryom wrote:
- Jack and his dad is out driving, when Jacks dad suddenly looses control over the car and crashes. Jacks dad dies instantly but Jack is rushed to the hospital. at the big hospital Jack is having surgery, but then the surgeon says ¨I canot operate on him, because he is my son Jack¨
how can that be? surgeon is his mum | |
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Voice of Reason Komsomol Member
Posts : 183 Join date : 2008-01-12
| Subject: Re: riddles. Fri Apr 04, 2008 9:08 pm | |
| Y ] R Y R
Y = Guy wearing a yellow hat R = Guy wearing Red hat ] = a wall, no one can look past
All guys are facing the wall. The red one and the Yellow one who are sitting next to the wall can see nothing else. The second Yellow one sees the Red guy in front of himself. The second Red one sees one Yellow and one Red hat.
How can the group find out who's wearing which hat. And who could know the answer.
Don't just guess, elaborate. | |
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oligarch Chairman of the WR Committee
Posts : 1643 Join date : 2008-01-31
| Subject: Re: riddles. Sat Apr 05, 2008 2:28 am | |
| - Voice of Reason wrote:
- Y ] R Y R
Y = Guy wearing a yellow hat R = Guy wearing Red hat ] = a wall, no one can look past
All guys are facing the wall. The red one and the Yellow one who are sitting next to the wall can see nothing else. The second Yellow one sees the Red guy in front of himself. The second Red one sees one Yellow and one Red hat.
How can the group find out who's wearing which hat. And who could know the answer.
Don't just guess, elaborate. Can they talk to each other? | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Sat Apr 05, 2008 2:55 am | |
| if they did. i wouldent be a riddle but i am guessing the can excalim what color hat they have | |
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Voice of Reason Komsomol Member
Posts : 183 Join date : 2008-01-12
| Subject: Re: riddles. Sun Apr 06, 2008 1:41 pm | |
| They can't talk to each other, but they would be informed if one of them would solve the situation. | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Sun Apr 06, 2008 5:37 pm | |
| can any of them be wrong, and from that the others can figure out what they have | |
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Voice of Reason Komsomol Member
Posts : 183 Join date : 2008-01-12
| Subject: Re: riddles. Sun Apr 06, 2008 7:08 pm | |
| Aside from the information whether the situation has been solved, the Hatguys get no info. And the hard part is not to guess who has which colour, it's the question of which guy can solve it. Hint : I have this experiment from Discovery Channel, the "1:1 000 000" show.
S**t, I forgot. The guys of course don't know which hat they themselves are wearing. | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Sun Apr 06, 2008 7:15 pm | |
| do they know how many colerd hts there are total. are they aware that there are 2 yellows and 2 reds | |
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Black_Cross Chairman of the WR Committee
Posts : 1702 Join date : 2008-04-04 Age : 35 Location : Sisyphean Hell
| Subject: Re: riddles. Mon Apr 07, 2008 9:38 pm | |
| Which one has the X-ray vision? | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Mon Apr 07, 2008 11:04 pm | |
| the yellow guy in the middle will solve it. the red guy will say i see a yellow and a red. the yellow since he sees a red will then figure out he has a yellow hat | |
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oligarch Chairman of the WR Committee
Posts : 1643 Join date : 2008-01-31
| Subject: Re: riddles. Tue Apr 08, 2008 9:59 am | |
| Anyone solved the eyes one yet? | |
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Black_Cross Chairman of the WR Committee
Posts : 1702 Join date : 2008-04-04 Age : 35 Location : Sisyphean Hell
| Subject: Re: riddles. Tue Apr 08, 2008 7:03 pm | |
| Does the person she looked at have any idea she is looking at him/her?
If so, that person's leaving. | |
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enviro Member of the Supreme Council
Posts : 2629 Join date : 2008-02-05 Age : 25 Location : bite the power
| Subject: Re: riddles. Tue Apr 08, 2008 11:03 pm | |
| nope she is speaking in general | |
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Voice of Reason Komsomol Member
Posts : 183 Join date : 2008-01-12
| Subject: Re: riddles. Wed Apr 09, 2008 12:40 am | |
| @environmentalist Correct. Though the Yellow hat guy in the middle doesn't need to talk to anyone. If the first two guys were wearing the same colour the last one would know. Thus the silence of the last guy is all the info Yellow hat needs. | |
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Watermelon ZEK in siberian gulag
Posts : 2650 Join date : 2008-04-05 Age : 29 Location : springfield, il
| Subject: Re: riddles. Wed Apr 09, 2008 12:59 am | |
| - Quote :
- Anyone solved the eyes one yet?
I searched on google and found this on Yahoo Answers. - Quote :
- Consider the situation if there were only 2 people with blue eyes. Everybody can see everybody else, and everybody already knew that the Guru could see someone with blue eyes. However, Blue-1 didn*t know that Blue-2 could see someone with blue eyes. After the Guru has spoken, Blue-1 still doesn*t know whether Blue-2 can see someone with blue eyes, so it might appear that no new information has been imparted. However, when midnight comes round, the fact that Blue-2 is still on the island imparts new information to Blue-1 - it tells him that Blue-2 must be able to see someone with blue eyes. This new information is enough to allow Blue-1 to work out that it must be his own eyes that are blue. Blue-2 reasons in a similar way. Therefore the two blue-eyed people leave on day 2.
Now consider the situation if there were 3 people with blue eyes. Blue-3 can work out the logic in the previous scenario, and expects Blue-1 and Blue-2 to depart on day 2. The fact that they don*t leave on day 2 imparts new information to Blue-3 - it tells her that Blue-1 and Blue-2 can each see more than one person with blue eyes. This new information is enough to allow Blue-3 to work out that it must be her own eyes that are blue. Therefore the three blue-eyed people leave on day 3.
The same reasoning can be extended to the situation where there are 3, 4, 5, 6,... 100 people with blue eyes. Since they all argue perfectly logically, they can work out that N blue-eyed people will leave on day N.
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