10 in Roman numerals, how to write?

10 = X
9 = ? ... 11 = ?

In Roman numerals online converter

Latest conversions of numbers to Roman numerals

10 = X Oct 17 04:07 UTC (GMT)
422,290 = (C)(D)(X)(X)MMCCXC Oct 17 04:07 UTC (GMT)
5,550 = (V)DL Oct 17 04:07 UTC (GMT)
2,016 = MMXVI Oct 17 04:07 UTC (GMT)
14,026 = (X)M(V)XXVI Oct 17 04:07 UTC (GMT)
47,627 = (X)(L)(V)MMDCXXVII Oct 17 04:06 UTC (GMT)
200,351 = (C)(C)CCCLI Oct 17 04:06 UTC (GMT)
7,700 = (V)MMDCC Oct 17 04:06 UTC (GMT)
123,321 = (C)(X)(X)MMMCCCXXI Oct 17 04:06 UTC (GMT)
876,965 = (D)(C)(C)(C)(L)(X)(X)(V)MCMLXV Oct 17 04:06 UTC (GMT)
304 = CCCIV Oct 17 04:06 UTC (GMT)
21,613 = (X)(X)MDCXIII Oct 17 04:06 UTC (GMT)
999 = CMXCIX Oct 17 04:06 UTC (GMT)
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Roman numerals reading rules, summary: