Super Bowl LIX kicks off on Sunday. What number is that, though? Here's how to use Roman numerals and why the NFL uses them ...

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.

Roman numerals, a system developed around 500 BC, use letters to represent numbers. The Kansas City Chiefs and Philadelphia Eagles will take the field for Super Bowl LIX on Sunday. But many ...