Multiple choice 91 XCI XCIII LXIII XCVI Reveal answer Fill a bubble to check yourself A Correct answer Explanation The number 91 is composed of 90 and 1. In Roman numerals, 90 is written as XC (10 before 100) and 1 is written as I, giving XCI. The other options represent 93 (XCIII) and 96 (XCVI).