Multiple choice 410 DXL CDX DCX None of the above Reveal answer Fill a bubble to check yourself B Correct answer Explanation The number 410 is composed of 400 and 10. In Roman numerals, 400 is written as CD (100 subtracted from 500) and 10 is written as X, which combines to CDX. The other options represent 540 (DXL) and 610 (DCX).