WHAT ARE ROMAN NUMERALS?
Roman numerals are a numbering system which was widespread throughout Europe until approximately 900 CE, when Arabic numerals supplanted Roman numerals for most applications. Roman numerals can still be seen on formal documents to mark the date or being used to iterate simple numerals, such as those used on an outline. For mathematical purposes, however, Roman numerals have long since been discarded, because they are clumsy and difficult to work with in comparison to Arabic numerals.