40 = XL
XL
The Roman numeral for 40 was XL.
XL meaning: -10+50 = 40
XXXVV
XL
XL
XL hours.
30 and 40, or 3040? 30 = XXX 40 = XL 3040 = MMMXL
XL (X = 10 and L = 50) 50 - 10 = 40
XXXX (40) or XL (50-10)
400 in Roman numerals is written as CD and 40 is written as XL.