11 in Roman Numerals
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11 in Roman numerals is XI. Split 11 by place value: 10 is X and 1 is I, and X + I joins into XI. All its letters are added: 10 + 1 = 11. In lowercase it is xi, and the number is eleven.
How XI is built
tens10 = 10 → X
10 is a single X.
ones1 = 1 → I
1 is a single I.
What sets XI apart
- Order matters
- X comes before I here, so I is added. Swap the two and IX means 9: the same letters, read as a subtraction.
- No letter repeats
- Each of the two letters in XI appears once.
- X plus one I
- Coming from 10, X, you only add another I.
- Doubled: 22
- Double it and you reach 22 (XXII): every letter of XI simply doubles.
Where you see XI
Sport
Super Bowl XI was played on January 9, 1977, in Pasadena, where the Raiders (then the Oakland Raiders) beat the Minnesota Vikings 32–14. Wikipedia The Games of the XI Olympiad were the 1936 Summer Olympics in Berlin. Wikipedia
Kings, queens and popes
Pope Pius XI (1922–1939) signed the Lateran Treaty that created Vatican City. Wikipedia
Films, games, books and software
Final Fantasy XI, an online role-playing game, was released in 2002. Wikipedia
Events and history
WrestleMania XI was held in Hartford, Connecticut, on April 2, 1995, headlined by former NFL linebacker Lawrence Taylor. Wikipedia
Systems numbered with XI
Cranial nerve XI is the accessory nerve, which supplies the trapezius and sternocleidomastoid muscles. Wikipedia
Numbers near 11
