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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. Ancient Roman units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ancient_Roman_units_of...

    In the Julian calendar, an ordinary year is 365 days long, and a leap year is 366 days long. Between 45 BC and AD 1, leap years occurred at irregular intervals. Starting in AD 4, leap years occurred regularly every four years. Year numbers were rarely used; rather, the year was specified by naming the Roman consuls for that year. (As consuls ...

  4. Roman calendar - Wikipedia

    en.wikipedia.org/wiki/Roman_calendar

    (Although these legendary beginnings attest to the venerability of the lunar calendar of the Roman Republic, its historical origin probably was the publication of a revised calendar by the Decemviri in 450 BC as part of the Twelve Tables, Rome's first code of law.) [4] The inequality between the lunar year of 355 days and the tropical year of ...

  5. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    A numeral system is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner. The same sequence of symbols may represent different numbers in different numeral systems. For example, "11" represents the number eleven in the decimal or ...

  6. 4 - Wikipedia

    en.wikipedia.org/wiki/4

    The Roman numeral IV stands for subgiant in the ... equivalent to half ... A leap year generally occurs every four years. [109] Approximately four weeks (4 times ...

  7. Greek numerals - Wikipedia

    en.wikipedia.org/wiki/Greek_numerals

    The first line contains the number " ͵θϡϟϛ δʹ ϛʹ ", i.e. " 9,996 + 1⁄4 + 1⁄6 ". It features each of the special numeral symbols sampi (ϡ), koppa (ϟ), and stigma (ϛ) in their minuscule forms. Greek numerals are decimal, based on powers of 10. The units from 1 to 9 are assigned to the first nine letters of the old Ionic alphabet ...

  8. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    BCE and CE or BC and AD are written in upper case, unspaced, without a full stop (period), and separated from the numeric year by a space (5 BC, not 5BC). It is advisable to use a non-breaking space. AD appears before or after a year (AD 106, 106 AD); BCE, CE, and BC always appear after (106 CE, 3700 BCE, 3700 BC).

  9. Latin numerals - Wikipedia

    en.wikipedia.org/wiki/Latin_Numerals

    The cardinal numerals are the ordinary numbers used for counting ordinary nouns ('one', 'two', 'three' and so on): The conjunction et between numerals can be omitted: vīgintī ūnus, centum ūnus. Et is not used when there are more than two words in a compound numeral: centum trīgintā quattuor. The word order in the numerals from 21 to 99 ...