Roman Numerals

The way we write numbers, using Hindu-Arabic numerals, is hardly the only way to do so. Many civilizations used other means to denote numbers. For example, the Romans represented numbers using the numerals I, V, X, L, C, D, and M. These numerals represent the following numbers:

Roman Numeral Hindu-Arabic Equivalent
I 1
V 5
X 10
L 50
C 100
D 500
M 100

There are a few rules for writing numbers with Roman numerals.