The Roman numeral for ten is X
DCX
Ten is represented by an X.
XII-I-MMX
I is one, V is five, X is ten, so XXX is thirty....
Not a proper Roman numeral. D is 500. X is ten It could be 510. Or it could be in improper attempt to write 490 (which would be CDXC).
DCX
Ten is represented by an X.
XII-I-MMX
I is one, V is five, X is ten, so XXX is thirty....
40 would usually be written as XL (fifty minus ten)
That would be MMXIII. M is one thousand, so you write two of them. X is ten, and I is one so you write three of them.
Ten is represented by an X and five by a V. The correct notation would be XVIII.
Not a proper Roman numeral. D is 500. X is ten It could be 510. Or it could be in improper attempt to write 490 (which would be CDXC).
Improved Answer:-In today's notation of Roman numerals 1978 = MCMLXXVIII, therefore ten symbols of six types are needed.
There are three ways you can write the number 10. You can use X, as in Roman numerals, ten, or 10.
Mmx vi xxiiiImproved answer:June-XXIII-MMX
Ten = V