06-07-2013, 01:19 PM | #11851 |
Now what?
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You ask the person standing next to you (making sure you don't peek) if the card is face up or face down
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06-07-2013, 01:25 PM | #11852 |
Not scared!
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This is one of those questions that at first sight appears to be impossible. However, if you look again and think laterally you realise that actually, yes...it is impossible
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06-07-2013, 01:33 PM | #11853 |
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^It's impossible until you make an assumption which isn't implicit in the question.
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06-07-2013, 03:55 PM | #11854 |
The Grand Mouse 高貴的老鼠
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It is possible, and I'm pretty sure I haven't missed stating any assumptions.
If you think I have, please state what I've missed out. If you want to do it privately by PM that's fine too. Last edited by pdurrant; 06-07-2013 at 03:58 PM. |
06-07-2013, 04:03 PM | #11855 |
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^Actually on further thinking, it can be done. I had to draw it out to see it. I can't answer because I had seen the answer previously, but I still thought it was assuming something, which in fact it doesn't have to.
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06-07-2013, 04:09 PM | #11856 |
The Grand Mouse 高貴的老鼠
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If you put your answer in spoilers, or in a PM, I'll let you know if I agree that you have the solution.
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06-07-2013, 04:35 PM | #11857 |
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Spoiler:
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06-07-2013, 04:38 PM | #11858 |
The Grand Mouse 高貴的老鼠
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Yes, HIMS has the right answer. But since he said that he didn't think it fair, since he's seen the problem before, I'll wait until tomorrow for someone else to come up with an answer, and if no one does, then I'll give my version of the answer.
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06-08-2013, 04:17 AM | #11859 | |
The Grand Mouse 高貴的老鼠
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Quote:
I never said the piles had to be the same size, just that they must contain the same number of face-up cards. How does it work? Like this. Some of the face-up cards are in the pile of 10, and some are in the rest. Let's call the number of face-up cards in the pile of 10 'U'. Since we know there are 10 face-up cards altogether, there are 10-U face-up cards in the bigger pile. Since there are 10 cards in the pile contain U face-up cards, it contains 10-U face-down cards. By turning the pile of 10 cards over, you change the face-up cards to face-down cards and vice-versa. So now the pile of 10 cards has 10-U face-up cards in it. And we already know that the bigger pile also has 10-U face-up cards in it! Problem solved! I think HIMS must give us the next question. |
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06-09-2013, 08:15 PM | #11860 |
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Someone else needs to pick this up.
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06-10-2013, 11:07 AM | #11861 |
The Grand Mouse 高貴的老鼠
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I'll post another then. Compete the following:
Points for giving the correct end to the quotation/saying, and more points for correctly identifying the origin. Last edited by pdurrant; 06-10-2013 at 05:36 PM. |
06-10-2013, 11:23 AM | #11862 |
Not scared!
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2. ..statistics
3. ...it should be vigourously thrown 4. ... much the same 5. ... a common language |
06-10-2013, 11:41 AM | #11863 |
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Close enough for 2,3,4 and 5. Four points to Bilbo.
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06-10-2013, 12:52 PM | #11864 |
Bah, humbug!
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The answer to no. 1, of course, is "42".
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06-10-2013, 12:54 PM | #11865 |
Bah, humbug!
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Oh, yeah. Source: THHGTTG series (spec: TRATEOTU).
Last edited by WT Sharpe; 06-10-2013 at 12:56 PM. |
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