MCMLII
The Roman numerals are XLV.
20 is Arabic Numerals XX is Roman Numerals.
MCMLXXXIX
DCLXVI
D1X
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
XXI
XL
MCMLXV
MMI
XLVI
MCMLXXXV