If you mean Roman numerals, then they are written as CAPITAL letters.
'mmx1' should be written as 'MMXI'
The key to Roman numerals is
M = 1000
D = 500
C = 100
L = 50
X = 10
V = 5
I = 1
Next The highest value letter goes to the left followed by lower value letters.
Two letter of the same symbol/value adjacent to each mean add.
Hence
MMXI = 1000 + 1000 + 10 + 1 = 2011
The current year of 2023 is MMXXIII
Next year 2024 is MMXXIV
Note the 'IV' compnent. 'I' is smaller value to the 'V' . this means subtract the value of 'I' from ' V' = 5 - 1 = 4
'MMX1' does not make sence in Roman Numerals, because '1' should be written as 'I' ; Capital letter. Hence it should read as 'MMXI'. Converting Roman numerals to Arabic Numerals. M = 1000 X = 10 I = 1 Hence MM = 1000 + 1000 = 2000 MMX = 2000 + 10 = 2010 MMXI = 2010 + 1 = 2011 NB The full table of Roman Numerals is M = 1000 D = 500 C = 100 L = 50 X = 10 V = 5 I = 1
To write october 18 2011 January 1 2014 in roman numerals. its equivalent form is X-XVIII-MMX1 and I-I-MMXIV.
'MMX1' does not make sence in Roman Numerals, because '1' should be written as 'I' ; Capital letter. Hence it should read as 'MMXI'. Converting Roman numerals to Arabic Numerals. M = 1000 X = 10 I = 1 Hence MM = 1000 + 1000 = 2000 MMX = 2000 + 10 = 2010 MMXI = 2010 + 1 = 2011 NB The full table of Roman Numerals is M = 1000 D = 500 C = 100 L = 50 X = 10 V = 5 I = 1
To write october 18 2011 January 1 2014 in roman numerals. its equivalent form is X-XVIII-MMX1 and I-I-MMXIV.