The longest Roman numeral with a value under 1000 would be DCCCLXXXVIII (888)
Under the rules now governing the Roman numeral system MCMXXI is equivalent to 1921
Under today's rules 490 expressed in Roman numerals is CDXC but the Romans themselves would have probably preferred XD.
The longest Roman numeral under 1000 is CMXCIX, which represents the number 999. This is the longest because it combines the largest Roman numeral symbols in descending order from left to right: CM for 900, XC for 90, and IX for 9. Roman numerals are additive, so the longest numeral is typically one that requires the most symbols to represent a number.
Under today's rules they represent 692 in Roman numerals.
Under today's rules the Roman numerals CMXLVII represent 947.
Under the rules now governing the Roman numeral system MCMXXI is equivalent to 1921
Under today's rules 490 expressed in Roman numerals is CDXC but the Romans themselves would have probably preferred XD.
The longest Roman numeral under 1000 is CMXCIX, which represents the number 999. This is the longest because it combines the largest Roman numeral symbols in descending order from left to right: CM for 900, XC for 90, and IX for 9. Roman numerals are additive, so the longest numeral is typically one that requires the most symbols to represent a number.
Under today's rules they represent 692 in Roman numerals.
Under today's rules the Roman numerals CMXLVII represent 947.
The given Roman numerals under today's rules now governing the Roman numeral system represent the equivalent of 1697 in Hindu-Arabic numerals.
It is already in Roman numerals but if you meant its equivalent in Hindu-Arabic numerals then under the present rules now governing the Roman numeral system it is 1465.
It is: DCCCCLXXXXVIIII = 999 although some would say it is DCCCLXXXVIII = 888 because under today's rules now governing the Roman numeral system 999 is now considered to be CMXCIX but the ancient Romans would have worked out the equivalent of 999 as DCCCCLXXXXVIIII which can be abridged to IM = -1+1000 = 999
Under todays modern rules governing the Roman numeral system it is the equivalent in Hindu-Arabic numerals of 3900
Under today's rules it is: CDXCIV
Under today's rules it is: CMXXIV
Under today's rules: September-XXVII-MCMLXXX September is the IX month.