ROMAN NUMERALS

Roman numerals are a numeral system developed in ancient Rome. It uses a combination of letters from the Latin alphabet to represent numbers.

The seven basic symbols are:

* I = 1

* V = 5

* X = 10

* L = 50

* C = 100

* D = 500

* M = 1000

To represent numbers, these symbols are combined using addition and subtraction.

For example:

* II = 2 (1+1)

* IV = 4 (5-1)

* IX = 9 (10-1)

* XI = 11 (10+1)

* XIX = 19 (10+(10-1))

* XX = 20 (10+10)