It means 18
The X is ten
The V is five
The I is one
so 10 + 5 + 1 + 1 + 1
which is 18
18. X means ten, V means 5, and each I means 1, so add it up and it equals 18.
18 written in Roman numerals is XVIII.
Xviii
The Roman numeral XVIII represents the number 18
Do you mean 3-18-1992? If so then in today's notation of Roman numerals it is: III-XVIII-MCMXCI
18 - XVIII
The date 9-18-2008 in Roman numerals is IX-XVIII-MMVIII.
If you mean xviii then it is the equivalent of 18 otherwise it is an invalid arrangement of Roman numerals.
Xviii = 18 x = 10 v = 5 i = 1
xviii
XVIII/IX/MMX
XVIII
XVIII