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  2. Crossword abbreviations - Wikipedia

    en.wikipedia.org/wiki/Crossword_abbreviations

    Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...

  3. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    The use of S (as in VIIS to indicate 7 1 ⁄ 2) is attested in some ancient inscriptions [45] and also in the now rare apothecaries' system (usually in the form SS): [44] but while Roman numerals for whole numbers are essentially decimal, S does not correspond to 5 ⁄ 10, as one might expect, but 6 ⁄ 12.

  4. -yllion - Wikipedia

    en.wikipedia.org/wiki/-yllion

    Better yet, "one centyllion" would have 2 102 + 1, or 507,0602;4009,1291:7605,9868;1282,1505, or about 1/20 of a tryllion digits, whereas a conventional "centillion" has only 304 digits. The corresponding Chinese "long scale" numerals are given, with the traditional form listed before the simplified form .

  5. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    14/11 = 1.272727272727... = 1. 27 or 321.3217878787878... = 321.321 78. If b = p is a prime number, one can define base-p numerals whose expansion to the left never stops; these are called the p-adic numbers. It is also possible to define a variation of base b in which digits may be positive or negative; this is called a signed-digit ...

  6. Names of large numbers - Wikipedia

    en.wikipedia.org/wiki/Names_of_large_numbers

    1 1 10 6: Million Million Million M Mega-2 1 10 9: Billion Thousand million Milliard G Giga-3 2 10 12: Trillion Billion Billion T Tera-4 2 10 15: Quadrillion Thousand billion Billiard P Peta-5 3 10 18: Quintillion Trillion Trillion E Exa-6 3 10 21: Sextillion Thousand trillion Trilliard Z Zetta-7 4 10 24: Septillion Quadrillion Quadrillion Y ...

  7. Alphabetic numeral system - Wikipedia

    en.wikipedia.org/wiki/Alphabetic_numeral_system

    An alphabetic numeral system employs the letters of a script in the specific order of the alphabet in order to express numerals.. In Greek, letters are assigned to respective numbers in the following sets: 1 through 9, 10 through 90, 100 through 900, and so on.

  8. History of ancient numeral systems - Wikipedia

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

    The first row has been interpreted as the prime numbers between 10 and 20 (i.e., 19, 17, 13, and 11), while a second row appears to add and subtract 1 from 10 and 20 (i.e., 9, 19, 21, and 11); the third row contains amounts that might be halves and doubles, though these are inconsistent. [14]

  9. Roman numeral analysis - Wikipedia

    en.wikipedia.org/wiki/Roman_numeral_analysis

    An upper case numeral that is not followed by a symbol is understood as a major chord. The use of Roman numerals enables the rhythm section performers to play the song in any key requested by the bandleader or lead singer. The accompaniment performers translate the Roman numerals to the specific chords that would be used in a given key.