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.
DCLXVI
MCMLXXXIX
XXI
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.
DCLXVI
MCMLXXXIX
XXI
MMDCCCLXXXVI
MCMLII
XL
MCMLXXXV
MMI