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Topic: Key Friends (Read 476 times) |
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ThudnBlunder
wu::riddles Moderator
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The dewdrop slides into the shining Sea
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Key Friends
« on: Apr 7th, 2003, 12:13pm » |
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I have five different keys belonging to five different friends. If I randomly return all of the keys to my friends, what is the probability that exactly four of them will be receive the right key?
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| « Last Edit: Apr 7th, 2003, 7:38pm 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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BNC
Uberpuzzler
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Re: Key Friends
« Reply #1 on: Apr 7th, 2003, 12:27pm » |
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It is a round result... yes indeed.
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How about supercalifragilisticexpialidociouspuzzler [Towr, 2007]
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aero_guy
Senior Riddler
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Re: Key Friends
« Reply #3 on: Apr 8th, 2003, 10:01am » |
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Methinks the easy section?
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| « Last Edit: Apr 8th, 2003, 10:06am by aero_guy » |
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ThudnBlunder
wu::riddles Moderator
Uberpuzzler
The dewdrop slides into the shining Sea
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Posts: 4489
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Re: Key Friends
« Reply #4 on: Apr 8th, 2003, 1:29pm » |
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Quote:| Methinks the easy section? |
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Hindsight is always 20/20.  But I think you are right in this case. As I wrote in another thread, most classic puzzles are now too well-known to post. So I will desist.
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| « Last Edit: Apr 8th, 2003, 1:38pm 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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towr
wu::riddles Moderator
Uberpuzzler
Some people are average, some are just mean.
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Re: Key Friends
« Reply #5 on: Apr 8th, 2003, 1:56pm » |
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Well, all classics that aren't on the main riddle pages yet should find their way there, I think..
So even if we here in the forum might know most them, I don't think it's a bad idea to post them..
(Besides, I like to come across a puzzle every now and then that I actually know how to solve )
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Wikipedia, Google, Mathworld, Integer sequence DB
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Icarus
wu::riddles Moderator
Uberpuzzler
Boldly going where even angels fear to tread.
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Re: Key Friends
« Reply #6 on: Apr 8th, 2003, 4:47pm » |
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It's been long enough that maybe I am wrong, but isn't there already a puzzle like this somewhere on the boards? I am too lazy to look it up.
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"Pi goes on and on and on ...
And e is just as cursed.
I wonder: Which is larger
When their digits are reversed? " - Anonymous
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