(Some countries use Roman numerals and some use Arabic numerals for numbers. And by Arabic numerals I don't mean 1-9.)
Roman numerals are I, V, X, etc.
* https://en.wikipedia.org/wiki/Arabic_numerals_(disambiguatio...
* https://en.wikipedia.org/wiki/Hindu–Arabic_numeral_system#Gl...
* https://en.wikipedia.org/wiki/List_of_numeral_systems
(Some countries use Roman numerals and some use Arabic numerals for numbers. And by Arabic numerals I don't mean 1-9.)