xxix

xxix is the Roman numeral for 29, the cardinal number that comes from twenty-eight plus one. It can name the number itself, or work like an adjective when it marks something as number twenty-nine, such as a chapter, page, date, or formal listing. But why does xxix end with IX instead of using more repeated letters? And when should you expect lowercase xxix rather than the more traditional uppercase XXIX? This lesson looks at the numeral’s structure, its noun and adjective roles, and the formal contexts where it still appears. Watch the full lesson to understand xxix with confidence.