XXIV
20 + 4 = 24
XXIV breaks down as XX + IV (XX = 20, IV = 4), which add up to 24. It uses subtractive notation: IV (5 - 1).
XXIV breaks down as XX + IV (XX = 20, IV = 4), which add up to 24. It uses subtractive notation: IV (5 - 1).
The number 24 is written XXIV in Roman numerals. Roman numerals use seven letters — I (1), V (5), X (10), L (50), C (100), D (500) and M (1000) — combined from largest to smallest, with subtractive pairs such as IV (4) and IX (9). Need another number? Use the Roman numeral converter or see the 1–100 chart.