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Old 09-28-2006, 10:27 PM   #1
Jeebizz
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Remember your Roman numerals?


What are the highest value of Roman numerals that anyone here know?

As far as I can get, I know up to 39, though I am not sure ... XXXIV, and somehow I doubt XXXX is 40, or it might be, but I am just not sure.
 
Old 09-28-2006, 10:32 PM   #2
zetabill
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I = one
V = five
X = ten
L = fifty
C = one hundred
D = five hundred
M = one thousand

40 would be XL because, of course, it's ten (X) from fifty (L).

This year is MMVI

1989 was MCMLXXXIX
1999 was MCMXCIX

etcetra

All from memory too.
 
Old 09-28-2006, 10:36 PM   #3
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I see......I never figured out what L C D and M were... doh...!
 
Old 09-28-2006, 11:03 PM   #4
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so 39 is XIL? It doesn't look right, but maybe it is, or XXXIX? hmm..
 
Old 09-28-2006, 11:07 PM   #5
rkelsen
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Thumbs up

Quote:
Originally Posted by Jeebizz
As far as I can get, I know up to 39, though I am not sure ... XXXIV, and somehow I doubt XXXX is 40, or it might be, but I am just not sure.
XXXIV = 34
XXXIX = 39
XL = 40

And the year I switched to Linux was MCMXCIX.

Last edited by rkelsen; 09-28-2006 at 11:09 PM.
 
Old 09-28-2006, 11:15 PM   #6
Jeebizz
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Quote:
Originally posted by rkelson
XXXIV = 34
XXXIX = 39
OH DUH! I got 9 (IX) confused with 4 (IV). I am really bad at this.
 
Old 09-29-2006, 07:24 AM   #7
hand of fate
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Quote:
Originally Posted by zetabill
1989 was MCMLXXXIX
1999 was MCMXCIX
I never understand why these numbers are often written in this excessively long way. A far more consise roman representation would be "MLMXXXIX" for 1989 and "MIM" for 1999.

Last edited by hand of fate; 09-29-2006 at 07:46 AM.
 
Old 09-29-2006, 08:08 AM   #8
rkelsen
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Quote:
Originally Posted by hand of fate
I never understand why these numbers are often written in this excessively long way. A far more consise roman representation would be "MLMXXXIX" for 1989 and "MIM" for 1999.
Because both of those are against the rules.

M can only be preceeded by C
D can only be preceeded by C
C can only be preceeded by X
L can only be preceeded by X
X can only be preceeded by I

49 cannot be written as IL. It must be written as XLIX.

Watch for the dates at the end of movies to see some good examples.
 
Old 09-29-2006, 09:34 AM   #9
pixellany
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I don't understand ho I could have made it to 65 without ever actually reading the RULES for Roman Numerals......

8 = VIII
9 = VIIII or IX (both legal?)
1900 = MCM (MDCCCC also legal?)

How did they do:
negative numbers?
decimals and fractions?
complex numbers? e.g. what is the square root of -I?

I'll bet that programming their computers was a real nightmare....
 
Old 09-29-2006, 09:41 AM   #10
Jeebizz
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Quote:
Originally posted by pixellany
9 = VIIII or IX (both legal?)
No 9 has always been IX.

Quote:
Originally posted by pixellany
How did they do:
negative numbers?
decimals and fractions?
complex numbers? e.g. what is the square root of -I?
I do not think the Romans had the concept of negative numbers, because that goes beyond zero to the left of the numberline, and AFAIK they also did not have the concept of 0. As far as decimals and fractions, I am not sure about that.
 
Old 09-29-2006, 09:59 AM   #11
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From Wikipedia, N = 0. (there is explanation of fractions as well)
 
Old 09-29-2006, 10:05 AM   #12
Jeebizz
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I stand corrected.... Sorry
 
Old 09-29-2006, 10:06 AM   #13
hand of fate
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Quote:
Originally Posted by rkelsen
Because both of those are against the rules.

M can only be preceeded by C
D can only be preceeded by C
C can only be preceeded by X
L can only be preceeded by X
X can only be preceeded by I

49 cannot be written as IL. It must be written as XLIX.
Firstly, who sets these rules, and who is bound by them?

Secondly, why make such rules? All these to do is make roman numbers unnecessarily long.
 
Old 09-29-2006, 05:47 PM   #14
rkelsen
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Quote:
Originally Posted by hand of fate
Firstly, who sets these rules, and who is bound by them?
The Romans? I don't know. All I know is that these rules are standard usage of Roman Numerals.
Quote:
Originally Posted by hand of fate
Secondly, why make such rules? All these to do is make roman numbers unnecessarily long.
I'm guessing here, but possibly because (for example) IL is (or is close to) a definite article in many Latin-derived languages?

Refer to the dates at the end of movies (especially movies from the 1980s) for examples of some long Roman Numerals.

Last edited by rkelsen; 09-29-2006 at 06:30 PM.
 
  


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