The NFL Marketing department thought that Super Bowl 50 looked better than Super Bowl L. So they used the numeric number instead of the Roman numeral.
The equivalent Roman numeral for 2015 is MMXV
MMXII
2004 was super bowl 38 so in roman numerals that is XXXVIII
XLVI
Xlv
XLII
MMXI
The 2006 Super Bowl was Super Bowl XL (40).
XLIV(44 in roman numerals).
number four :)
XLV is roman numeral for 45. It's the 45th Super Bowl.
Super Bowl MMV