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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    A medieval accounting text from 1301 renders numbers like 13,573 as "XIII. M. V. C. III. XX. XIII", that is, "13×1000 + 5×100 + 3×20 + 13". [ 39 ] Other numerals that do not fit the usual patterns – such as VXL for 45, instead of the usual XLV — may be due to scribal errors, or the writer's lack of familiarity with the system, rather ...

  3. Latin numerals - Wikipedia

    en.wikipedia.org/wiki/Latin_Numerals

    The Latin numerals are the words used to denote numbers within the Latin language. They are essentially based on their Proto-Indo-European ancestors, and the Latin cardinal numbers are largely sustained in the Romance languages.

  4. 42 (number) - Wikipedia

    en.wikipedia.org/wiki/42_(number)

    42 is a pronic number, [1] an abundant number [2] as well as a highly abundant number, [3] a practical number, [4] an admirable number, [5] and a Catalan number. [6]The 42-sided tetracontadigon is the largest such regular polygon that can only tile a vertex alongside other regular polygons, without tiling the plane.

  5. Vigesimal - Wikipedia

    en.wikipedia.org/wiki/Vigesimal

    D0 20 is equivalent to two hundred and sixty in decimal = (13 × 20 1) + (0 × 20 0) 100 20 is equivalent to four hundred in decimal = (1 × 20 2) + (0 × 20 1) + (0 × 20 0). In the rest of this article below, numbers are expressed in decimal notation, unless specified otherwise. For example, 10 means ten, 20 means twenty. Numbers in vigesimal ...

  6. 116 (number) - Wikipedia

    en.wikipedia.org/wiki/116_(number)

    116 is a noncototient, meaning that there is no solution to the equation m − φ(m) = n, where φ stands for Euler's totient function. [1]116! + 1 is a factorial prime. [2] ...

  7. 1,000,000 - Wikipedia

    en.wikipedia.org/wiki/1,000,000

    1,000,000 (one million), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001. The word is derived from the early Italian millione (milione in modern Italian), from mille, "thousand", plus the augmentative suffix -one.

  8. 111 (number) - Wikipedia

    en.wikipedia.org/wiki/111_(number)

    111 is or the second repunit in decimal, [8] a number like 11, 111, or 1111 that consists of repeated units, or ones. 111 equals 3 × 37, therefore all triplets (numbers like 222 or 777) in base ten are repdigits of the form . As a repunit, it also follows that 111 is a palindromic number.

  9. 231 (number) - Wikipedia

    en.wikipedia.org/wiki/231_(number)

    This article about a number is a stub. You can help Wikipedia by expanding it.