It is: 510 = DX
510
The Roman Numeral symbol for 500 is the letter D. You would represent the number 510 as DX.
It is: 510/2 = 255 which is the equivalent of CCLV in Roman numerals
1/5 of DX (510) is CII (102)
Exactly as in the question but if you mean in Roman numerals they are CDXXXVI, DX and CCX respevtively
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).
dx
the answer to what is the roman numeral for 101 is CI
'XXV' is the Roman Numeral. I think you wish to know the Arabic (Modern) number, which is '25'.
510 510
No, K is not a roman numeral.
There is not a Roman Numeral for 0.