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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    There are some examples of year numbers after 1000 written as two Roman numerals 1–99, e.g. 1613 as XVIXIII, corresponding to the common reading "sixteen thirteen" of such year numbers in English, or 1519 as X XIX as in French quinze-cent-dix-neuf (fifteen-hundred and nineteen), and similar readings in other languages.

  3. X - Wikipedia

    en.wikipedia.org/wiki/X

    The Roman numeral X represents the number 10. [6] [7] In mathematics, x is commonly used as the name for an independent variable or unknown value. The modern tradition of using x, y, and z to represent an unknown was introduced by René Descartes in La Géométrie (1637). [8]

  4. Number Forms - Wikipedia

    en.wikipedia.org/wiki/Number_Forms

    Roman Numeral Nine 2168 8552 Ⅹ X: 10 Roman Numeral Ten 2169 8553 Ⅺ XI: 11 Roman Numeral Eleven 216A 8554 Ⅻ XII: 12 Roman Numeral Twelve 216B 8555 Ⅼ L: 50

  5. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    A form of unary notation called Church encoding is used to represent numbers within lambda calculus. Some email spam filters tag messages with a number of asterisks in an e-mail header such as X-Spam-Bar or X-SPAM-LEVEL. The larger the number, the more likely the email is considered spam. 10: Bijective base-10: To avoid zero: 26: Bijective base-26

  6. History of ancient numeral systems - Wikipedia

    en.wikipedia.org/wiki/History_of_ancient_numeral...

    The Roman numerals developed from Etruscan symbols around the middle of the 1st millennium BCE. [34] In the Etruscan system, the symbol 1 was a single vertical mark ...

  7. 10,000,000 - Wikipedia

    en.wikipedia.org/wiki/10,000,000

    Roman numeral: X: Greek prefix: hebdo-Binary: ... 67,110,932 = number of 32-bead binary necklaces with beads of 2 colors where the colors may be swapped ...

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  9. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    The number the numeral represents is called its value. Not all number systems can represent the same set of numbers; for example, Roman numerals cannot represent the number zero. Ideally, a numeral system will: Represent a useful set of numbers (e.g. all integers, or rational numbers)