Add together the individual numerals (M = 1000, D = 500, C = 100, L = 50, X = 10, V = 5, I = 1) unless a smaller numeral precedes a larger one in which case subtract it from the larger ones.
→ MCMXC = 1000 + (-100 + 1000) + (-10 + 100) = 1990.
A typographic error.
They represent 1888 in Arabic or English numbers
It is algebra that uses letters to represent numbers and also Roman numerals.
MCMXC is a Roman numeral representation of the year 1990. In this system, "M" stands for 1000, "CM" represents 900 (1000 - 100), and "XC" denotes 90 (100 - 10). Thus, when combined, MCMXC totals to 1990.
It is: 205 = CCV in Roman numerals
In todays modern notation of Roman numerals they represent: 1990
Nowadays it is the equivalent of: 8-10-1990
1990
In today's notation of Roman numerals it is: XXVII-XI-MCMXC
In todays notation of Roman numerals: XXIV-VI-MCMXC
In todays notation of Roman numerals: VIII-V-MCMXC
MCMXC MXM or possibly MDCCCCXC
i / viii / mcmxc
In today's arrangement of Roman numerals: XIV-II-MCMXC
In today's notation of Roman numerals: X-XIV-MCMXC
16999 written as a roman numeral would be: (XV)MCMXC
November 9, 1990 is written as IX-IX-MCMXC in Roman numerals. The "IX" represents November, the "IX" represents the day (9th), and the "MCMXC" represents the year (1990).