20 in Roman Numerals
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20 in Roman numerals is XX. 20 is two Xs in a row: XX. All its letters are added: 10 + 10 = 20. In lowercase it is xx, and the number is twenty. With two letters, XX is shorter than both XIX (19) and XXI (21).
How XX is built
tens20 = 2 × 10 → XX
20 is two Xs in a row: XX.
What sets XX apart
- Two Xs
- XX doubles X. A third X is still allowed, and that is XXX, 30; after it the tens switch to subtraction.
- Two places change
- 20 is a round step: the tens and ones change at once, and XIX becomes XX, one letter shorter.
- Twice 10
- 20 is twice 10 (X), and here the letters double too: each letter of X is written twice to make XX.
- A tenth of it
- XX is the numeral for 2, II, with each letter moved up one rank.
Where you see XX
Sport
Super Bowl XX was played on January 26, 1986, in New Orleans, where the Chicago Bears beat the New England Patriots 46–10. Wikipedia The Games of the XX Olympiad were the 1972 Summer Olympics in Munich. Wikipedia
Kings, queens and popes
There has never been a Pope John XX: a medieval numbering error skipped the number, so John XIX was followed by John XXI. Wikipedia
Events and history
WrestleMania XX was held at Madison Square Garden in New York on March 14, 2004. Wikipedia
Systems numbered with XX
In most traditional tarot decks, Judgement is Major Arcana card XX. Wikipedia
Roman calendar and Latin
In Latin, the number 20 is vīgintī. Wiktionary
Numbers near 20
