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.

Rule 9 of The Password Game states that your password must contain Roman numerals that, when multiplied together, equal 35.

(WHTM) — The Eagles are headed to Super Bowl LIX. But, you may have wondered, why isn’t it just Super Bowl 59? Bob Moore, historian for the Kansas City Chiefs told the Associated Press in 2012 ...

Some elements, particularly the transition metals, do not always have the same valency in their different compounds. The valency of these elements is usually given in roman numerals inside brackets.