Example 4. Write the Roman numeral for 1999

        Answers: 1999 = 1000 + 900 + 90 + 9 = M + CM + XC + IX

                        = MCMXCIX

Example 5. Historic representation of numerals (state equivalent Hindu-Arabic numerals):
 

Roman numerals: MCCCXLIV =  M + CCC + XL +IV =  1000 + 300 + 40 + 4 = 1344	Egyptian (2563)
Mayan (31781148)	Babylonian (1 603 + 57 602 + 46 60 + 40 = 424000 )