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Topic: Black and white (Read 741 times) |
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DeMark
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Black and white
« on: Sep 26th, 2004, 10:53am » |
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Professor Smith invited 3 of his students to his place and told them: "I have a few hats here, 2 of them are black, and the rest is white." He put a hat on the head of every student, so they could see what is the colour of hats his friends have, but they couldn't see the colour of the hat on their head.
When he did it, he asked the first student: "What is the colour of the hat on your head?", and he answered: "I don't know". It went the same way with the second student. What is the third student going to say?
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ThudnBlunder
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Re: Black and white
« Reply #1 on: Sep 26th, 2004, 11:35am » |
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Quote:| What is the third student going to say? |
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"Search me." 
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| « Last Edit: Sep 27th, 2004, 4:44am by ThudnBlunder » |
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THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you.
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rmsgrey
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Re: Black and white
« Reply #2 on: Sep 26th, 2004, 11:37am » |
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The third student probably says "I don't know" - I know when I was a student, I wouldn't have trusted my friends not to stitch me up in such a situation, so since the third student has to judge the situation primarily based on what his friends said, unless he sees two black hats he can't be sure what colour his own is.
[e]great minds...[/e]
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| « Last Edit: Sep 26th, 2004, 11:39am by rmsgrey » |
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Grimbal
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Re: Black and white
« Reply #3 on: Sep 26th, 2004, 1:47pm » |
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Hehe... I just thought of the following problem:
The professor tells the 3 students: "I picked the 3 of you out of 5 students, 2 of them have black hair, 3 of them are blond.
He asks the first student: "What is the colour of your hair?", and he answers: "I don't know". It goes the same way with the second student. What is the third student likely to answer to the same question?
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asterix
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These guys are just being silly. Of course, the third player answers that his hat is green. Since there is no stated penalty for guessing wrong, the first players would have guessed unless they figured guessing was hopeless. They know that if they both say "I don't know" the third person will know the color of his hat (assuming the professor was telling the truth), and that would upset the class curve. Therefore they must be convinced that their answers will be of no help to him. What they don't know is that the third student is aware that Professor Smith's maiden name is Katie O'Reilly (and the Irish are known for their blarney), so it must be green. QED.
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ThudnBlunder
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Re: Black and white
« Reply #5 on: Sep 26th, 2004, 5:33pm » |
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on Sep 26th, 2004, 1:47pm, Grimbal wrote:Hehe... I just thought of the following problem:
The professor tells the 3 students: "I picked the 3 of you out of 5 students, 2 of them have black hair, 3 of them are blond.
He asks the first student: "What is the colour of your hair?", and he answers: "I don't know". It goes the same way with the second student. What is the third student likely to answer to the same question? |
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Hehe...well, in that case he answers, "Search me, pal."
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| « Last Edit: Sep 27th, 2004, 4:45am by ThudnBlunder » |
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