xxiv
xxiv is the Roman numeral for twenty-four: the number after twenty-three and before twenty-five. You may see it as XXIV in chapter numbers, formal labels, historical references, clock displays, or other places where Roman numerals give a traditional or decorative style. But why does it end in IV instead of simply adding more marks, and when should you write XXIV rather than 24 or twenty-four? This lesson looks at how the numeral is built, how it can act as a noun or adjective, and where it sounds natural. Watch the full lesson to read and use xxiv with confidence.