11
here you go.In roman`s numberals its looks like this X-10 and XI-11
IX = 9. 11 is XI in Roman Numerals.
In todays modern usage of Roman numerals it is: XI-X-MCMXCIII but the ancient Romans probably wrote out the equivalent of 1993 quite differently
1736
MCMLXXXXII
CLXXXIX
1607
40032
2000 = MM
20 = XX
50
It is: 5 = V