2005 = MMV
Method.
M = 1000
MM = 1000 + 1000 = 2000
V = 5
MMV = 2000 + 5 = 2005
The Roman numerals are XLV.
20 is Arabic Numerals XX is Roman Numerals.
MCMLXXXIX
DCLXVI
MCMLII
The Roman numerals are XLV.
18 in roman numerals looks like XVIII
20 is Arabic Numerals XX is Roman Numerals.
300 would be represented by 'CCC' in roman numerals.
MCMLXXXIX
DCLXVI
MCMLII
XXI
XL
MCMLXV
MMI
XLVI