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When a smaller number is before a larger, you subtract. XXL would be saying 20 subtrackted from 50, which is 30, when you could instead just write XXX. You always want the lowest possible number before adding a higher value to the equation. This also doesn't work, because looking at it another way this could say 20 plus 50 which is 70 and that is written LXX. So as to why it wouldn't work is either there is to many X's in front of the L, or it is written backwards.

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what xxl in roman numerals?

XXL is not a valid numeral. You can use X (10) and XL (40), or you can use XX (20) and L (50), but you cannot use XXL.


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XXXL is not a real Roman numeral L = 50 and X = 10. Putting a 'smaller' letter in front of a 'larger' one was a way to signify "less than" so that XL = 40.... 10 less than 50. But the Romans would not have put three consecutive Xs in front of an L. Doing that would tend to indicate 30 less than 50, but that equals 20 and 20 was always represented by XX. Only one lesser numeral was ever put in front of a larger one. X = 10 XX = 20 XXX = 30 XL = 40 L = 50 LX = 60 LXX = 70 LXXX = 80 XC = 90 C = 100


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