Some rules regarding Roman numerals state that a symbol representing 10^x may not precede any symbol larger than 10^(x + 1); use XCIX not IC for 99.
The "modern" Roman numerals, post-Victorian era, are shown below:
Roman | Arabic | Notes |
---|---|---|
I | 1 | |
II | 2 | |
III | 3 | |
IV | 4 | IIII is still used on clock faces |
V | 5 | |
VI | 6 | |
VII | 7 | |
VIII | 8 | |
IX | 9 | |
X | 10 | |
XI | 11 | |
XIV | 14 | |
XV | 15 | |
XIX | 19 | |
XX | 20 | |
XXX | 30 | |
XL | 40 | |
L | 50 | |
LX | 60 | |
XC | 90 | |
C | 100 | This is the origin of using the slang term "C-bill" for "$100 bill". |
CC | 200 | |
CD | 400 | |
D | 500 | |
CM | 900 | |
M | 1000 | |
ↀ | 1000 | conjoined C and D, alternative to M |
MCMXLV | 1945 | |
MIM | 1999 | Note: this may not be correct, as some claim that 'I' can only precede 'V' or 'X'.
The rumor that Nintendo would release a sequel to the [Mario Is Missing]? game in the year 1999 turned out to be false. |
MCMXCIX | 1999 | More "correct" |
ↁ | 5000 | |
ↂ | 10000 | |
Ↄ | Reversed 100 | Used in combination with C and I to form large numbers |
See also: Arabic numerals, Chinese numerals, Hebrew numerals, Mayan numerals, Number system