BOOK XIII
xiii would also suffice for 13.
The number 13 in Roman numerals is XIII
In Roman Numerals you write 13 like this: Xlll
The Roman numeral for the number 13 is XIII
January 13th 2000 can also be written as 01-13-2000 and in Roman numerals that would be I.XIII.MM
13 in Roman numerals is XIII
XIII-III-MMXI
X-XIII-MMI
It is: VIII-XIII-MMX
Iii - xiii - lxxxvi
XIII-IX-MMI
It is: VII-XIII-MMVII
They are: XI, IX and XIII respectively