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In checking out a site tsuwm provided a while back, I came across this passage:
"The sequence continues with quaternary, quinary, senary, septenary, octonary, nonary, denary. Words also exist for `twelfth order' (duodenary) and `twentieth order' (vigenary)."
When would you use words, such as nonary, and if duodenary is twelfth order, what would eleventh order be?
But, more to the point, in what kinds of applications would you use these higher orders? I'm familiar with using primary and secondary sources....but I doubt anyone would refer to duodenary sources!
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Carpal Tunnel
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well, until the euro, isn't there the use of the duodenary division of the shilling?! generally though, the answer to your question is that the term is probably only going to exist (other than in nonce form) if it's useful. duodenary might also come into <ahem> play in 12-tone music.
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MathWorld - Eric Weisstein
http://mathworld.wolfram.com/BaseNumber.html
Base Name
2 binary
3 ternary
4 quaternary
5 quinary
6 senary
7 septenary
8 octal
9 nonary
10 decimal
11 undenary
12 duodecimal
16 hexadecimal
20 vigesimal
60 sexagesimal
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undenary gets excisely 15 google hits, none of them actually using it. this makes it an underous candidate for wwftd. but the 12th and 20th orders are so important as to deserve TWO words per each.
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I think he means prezactly.
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I did not want to tax with having committed a verbal misdemenor.
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>I think he means prezactly.
but additionally, those fifteen google hits are not worth the paper they're written on; i.e., they could all be excised. I try not to be entiredly frivolous with these..
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Sex is a misdemeanor. The more you miss de meaner you get.
TEd
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Sex is a misdemeanor. The more you miss de meaner you get.
come again?
formerly known as etaoin...
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TEd
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Carpal Tunnel
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I thought Miss Demeanour was who you had the sex with ... ?
The idiot also known as Capfka ...
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old hand
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old hand
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And what, pray tell, might this have to do with the duodenum? Or does that question belong in "Words from medicine"? 
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I think we hit the 60th order.. 
formerly known as etaoin...
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I am reminded of the famous histology prof who gave as a
trick on a slide reading quiz sections of penis inside
esophagus. He gave good grade to studentwhose diagnosis
was long peckered c---s----- caught in the act. It isn't
entirely logical, but it proved that the trick had not
fooled him.
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Carpal Tunnel
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ok, now I'm really sorry we brought up that memory, Bill! 
formerly known as etaoin...
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In reply to:
11 undenary
12 duodecimal
16 hexadecimal
20 vigesimal
60 sexagesimal
Well, wwh, what about 13 and th'otheruns not on your list? Does math world get into those?
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Dear etaoin: Sorry about the deep throat reminiscence
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Carpal Tunnel
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haha. no problem, Bill!
formerly known as etaoin...
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well certain numbers work out better for systems. decimal seems the easiest, because most of us learned it first, but once you start working a bit in binary, it is the easiest-- especialy because you can quickly switch to octal or hexidecimal.
base 13 (13 remember is a prime number) doesn't have the same advantage.
we have vestiges of other numbering systems in our everyday life, (sixty minutes to an hour, sixty seconds to a minute, and 360 (six times sixty) degrees in a circle (based on 6 lovely equalateral trianges, each with 60 degree angles,nesting inside of a circle.
base twenty shows up in "score" and base 12, in shilling, and inches.
we have inherited all sorts of numbering systems, (and for the most part, don't even think twice about them.) but i can't think of any but binary that are based on prime numbers.
pentagon are used alegedly by witches, but not as a numbering system.
of course, you could use an base you wanted, and there might be unseen advantages, in going so.
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Dear WW: about no 13th order. I doubt that it is Triskaidekophobia ..but just that there is no
special use of thirteen in math.
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In reply to:
I doubt that it is Triskaidekophobia ..but just that there is no special use of thirteen in math.
Well, what about lots of bakers' dozens? Lots of bakers' dozens would have some special use in bakery math...
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Dear WW: the bakers certainly did not like the number thirteen, but there was a savage
penalty for only putting eleven in the bag and calling it twelve.I searched for history, and
found this:
"This expression meaning thirteen of something, is many centuries old. It goes back to the
days when bread was the staple diet of the populace and it was illegal to sell it underweight.
In order to make certain that they did not incur a heavy penalty for selling underweight, many
bakers gave 13 loaves to the dozen, just to make sure. This extra loaf was called the
"vantage" loaf.
I never heard the word "vantage" used that way before.
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This is actually very unlike us, doing it by the numbers. Cease and desist immediately, I say!
The idiot also known as Capfka ...
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