What are the symbols which are never repeated in the Roman numeral system?
X, C, L
C, D, M
V, L, D
V, C, I
V, L, D are never repeated in the Roman numeral system.
For example, We write 102 as 'CII'. We can't write it as 'LLII'.
While writing a Roman numeral, only the numerals I, X, C and M can be repeated. V, L and D cannot be repeated.