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Jondahr (Jondahr)
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Post Number: 56
Registered: 10-2011
Posted on Tuesday, October 18, 2011 - 10:27 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

He didn't believe it until he proved it himself. And even then, he could hardly believe it.
Jondahr (Jondahr)
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Post Number: 57
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Posted on Tuesday, October 18, 2011 - 10:31 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Oops! Sorry, forgot my name in the title. Am I right to assume that only a moderator can fix it once the mistake is made?
Balin (Balin)
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Post Number: 15348
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Posted on Wednesday, October 19, 2011 - 12:00 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

That's right. But you just need to ask and one of the mods will get it.

Are all "he"s the same? H? A? M?
Are all "it"s the same? It = an object? Feeling? Theory? Statement?
Proved it: scientifically? Logically?
Jondahr (Jondahr)
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Post Number: 58
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Posted on Wednesday, October 19, 2011 - 12:10 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

That's right. But you just need to ask and one of the mods will get it. All right. Thanks!

Are all "he"s the same? yes H? A? M? I think he is probably a child or teenager, but it isn't really all that relevant, otherwise yes
Are all "it"s the same? It = an object? Feeling? Theory? Statement? this
Proved it: scientifically? I suppose it would be this one, though a pretty simple form Logically?
Balin (Balin)
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Post Number: 15357
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Posted on Wednesday, October 19, 2011 - 1:57 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Is he very young?
Is he proving something he was taught? At school? By a parent?
Jondahr (Jondahr)
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Post Number: 61
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Posted on Thursday, October 20, 2011 - 6:40 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Is he very young? not really relevant, assume teens
Is he proving something he was taught? yes At school? this By a parent? but it could just as well have been this, without making the puzzle all that different
Balin (Balin)
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Post Number: 15392
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Posted on Thursday, October 20, 2011 - 1:53 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Did he learn this for one of his classes? Does it matter which?
Jondahr (Jondahr)
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Post Number: 64
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Posted on Thursday, October 20, 2011 - 2:30 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Did he learn this for one of his classes? he learned it in classDoes it matter which? yesish, could've been a couple, but some are more likely than others
Shez (Shez)
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Post Number: 2198
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Posted on Thursday, October 20, 2011 - 5:41 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

a science class? history? geography? economics? religion? maths? a language class? sport?
Jondahr (Jondahr)
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Post Number: 65
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Posted on Thursday, October 20, 2011 - 7:51 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

a science class? could be history? very unlikely, but i guess it could happen geography? no, that would be very odd economics? it's a stretch, but could be religion? probably not maths? by far the most likely a language class? probably not sport?almost definitely not
Tardigradeparty (Tardigradeparty)
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Post Number: 57
Registered: 9-2011
Posted on Saturday, October 22, 2011 - 4:02 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Does "proved it himself" refer to a mathematical proof?
Jondahr (Jondahr)
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Post Number: 78
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Posted on Saturday, October 22, 2011 - 4:12 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Does "proved it himself" refer to a mathematical proof? no, no need for that - this could be proved in a much simpler, more practical way
Rbruma (Rbruma)
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Posted on Tuesday, October 25, 2011 - 8:24 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Was it like "proving" that 2+2=4 by using an abacus? Or am I entirely OTWT here?
Jondahr (Jondahr)
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Post Number: 87
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Posted on Tuesday, October 25, 2011 - 9:15 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Was it like "proving" that 2+2=4 by using an abacus? Or am I entirely OTWT here? yope, I probably think going down that road would confuse you. A better road may be to try and work out what kind of "math" we're talking about here.
Tardigradeparty (Tardigradeparty)
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Post Number: 66
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Posted on Tuesday, October 25, 2011 - 12:22 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Consumer math, maybe? Something like compound interest?
Jondahr (Jondahr)
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Post Number: 89
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Posted on Tuesday, October 25, 2011 - 12:52 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Consumer math, maybe? Something like compound interest? no, nothing like that
Galfisk (Galfisk)
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Posted on Tuesday, October 25, 2011 - 10:06 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Exponential growth relevant? The problem of placing one grain on the first square of a chessboard, 2 on the next, 4, 8 and so on, and ending up with more grains than there exist on earth?
Jondahr (Jondahr)
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Post Number: 90
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Posted on Tuesday, October 25, 2011 - 10:44 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Exponential growth relevant? The problem of placing one grain on the first square of a chessboard, 2 on the next, 4, 8 and so on, and ending up with more grains than there exist on earth? no, and you're really all thinking far too complicated - I do like the chessboard story, though, and it could've made a good LP (:
Shez (Shez)
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Post Number: 2224
Registered: 2-2011
Posted on Wednesday, October 26, 2011 - 8:35 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

simple arithmetic? geometry? trigonometry? statistics? algebra?
Jondahr (Jondahr)
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Post Number: 93
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Posted on Wednesday, October 26, 2011 - 1:04 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

simple arithmetic? geometry? trigonometry? statistics? this algebra?
Balin (Balin)
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Post Number: 15478
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Posted on Wednesday, October 26, 2011 - 1:56 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Permutations? Combinations?
Jondahr (Jondahr)
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Post Number: 94
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Posted on Wednesday, October 26, 2011 - 2:47 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Permutations? Combinations? ehm, I don't think so... I think we're a bit outside of my math skills here

I think i might have thrown you off track with the math thing - note that I only said that of the mentioned subjects that was the most likely one for it to be mentioned in. Put it this way: you've figured out that it has to do with statistics. That is about as much you have to know about the math side of it. (I hope this was understandable?)
Shez (Shez)
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Post Number: 2303
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Posted on Tuesday, November 08, 2011 - 9:26 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

was it a particular statistic which he didn't believe?

did he prove it in class? outside?
Jondahr (Jondahr)
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Post Number: 184
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Posted on Tuesday, November 15, 2011 - 9:53 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

was it a particular statistic which he didn't believe? yes, well, a particular statistical phenomenon

did he prove it in class? this outside? though there are plenty of contexts outside of class where he could have
Shez (Shez)
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Post Number: 2334
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Posted on Wednesday, November 16, 2011 - 10:55 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

was it concerned with probabilities? tossing a coin? throwing dice?
Jondahr (Jondahr)
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Username: Jondahr

Post Number: 192
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Posted on Thursday, November 17, 2011 - 11:23 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

was it concerned with probabilities? yes tossing a coin? throwing dice? none of these, but somewhat OTRT
Docd (Docd)
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Posted on Friday, November 18, 2011 - 9:54 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Did he demonstrate the truth of some sort of statistical paradox? Are the classmates involved?
Jondahr (Jondahr)
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Post Number: 204
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Posted on Friday, November 18, 2011 - 10:58 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Did he demonstrate the truth of some sort of statistical paradox? a seeming paradox, yes Are the classmates involved? yes
Docd (Docd)
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Post Number: 162
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Posted on Friday, November 18, 2011 - 11:13 am:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

The Birthday Paradox?
Jondahr (Jondahr)
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Post Number: 206
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Posted on Friday, November 18, 2011 - 2:13 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

The Birthday Paradox? *Lets the trumpets sound*

And just like that, the puzzle is solved!

*****SPOILER*****

This exact story is taken from a blog I read where some guy retold that his teacher had told them that there was a larger than 60% chance that two people in their class had the same birthday. He didn't believe it until he went around class and discovered that there were actually TWO pairs of classmates who shared the same birthday. He still couldn't quite believe it, though.

For those who haven't heard of it, the birthday paradox says that with a group of 57 people, the chances of there being two people who share the same birthday is actually 99%! Docd's link contains much more information for anyone interested.

Thanks for playing, and well done Docd!
Balin (Balin)
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Username: Balin

Post Number: 15807
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Posted on Friday, November 18, 2011 - 4:54 pm:   Edit PostDelete PostView Post/Check IPPrint Post   Move Post (Moderator/Admin Only)Ban Poster IP (Moderator/Admin only)

Nice puzzle!

In 11th grade, I took a college statistics class with 20 people in it, and the professor discussed this paradox. Since there were 20 people, the chance of a match was just over 40%...but there was a match anyway: two people were born on December 20.

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