Just as English slips into Math through Algebra, Math sneaks into English through numerals. Various guidelines can aid writers in using them.
A numeral is a symbol of a number. “20″, “six”, and “XII” are the numerals of the numbers they represent. You cannot actually see a 2, but any of the words/symbols that describe the number 2 are called numerals.
Arabic numerals are those we use every day, such as 13 and 6. Roman numerals are seen less frequently and consist of the letters I, V, C, L, X, D, and M in varied combinations. They are often used in titles and names, like “Bertram Moore III” and “Superbowl XLV”.