XI = 11. X being 10 and I being 1. 10+1=11.
19
DLXXIV
XXIV = 24
It is: 571 = DLXXI
It is: III-XX-XII
550Improved Answer:-XL = 40
XL = 40
Xl = -10+50 = 40
As a Roman numeral XL is the equivalent of 40
one thing is it is unknown it was not recorded for a estimate 1112110
46
40