Add together the individual numerals (M = 1000, D = 500, C = 100, L = 50, X = 10, V = 5, I = 1) unless a smaller numeral precedes a larger one in which case subtract it from the larger one.
→ XVII = 10 + 5 + 1 + 1 = 17.
xvii means 17
In Roman numerals XVII = 17
It does not mean anything because it is an invalid arrangement of Roman numerals
It does not mean anything because they are an invalid arrangement of Roman numerals
They do not mean anything because they are an invalid arrangement of Roman numerals