You're probably not alone, as the Roman numeral system is taught ... system (also known as Arabic or Hindu-Arabic numerals), ...

Roman numerals are a numeral system which was used in Ancient Rome. It uses letters instead of numbers to represent values. You may have seen Roman numerals on clocks and on TV or film credits.

The use of Roman Numerals began with the fifth edition ... X, and L stand for 1, 5, 10, and 50 respectively. If I appears after a symbol, it is added to the larger symbol. If it comes before ...