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  2. 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 ...

  3. Decimal separator - Wikipedia

    en.wikipedia.org/wiki/Decimal_separator

    3.14159 26535 89793 23846 is π rounded to 20 decimal places 2.71828 18284 59045 23536 is e rounded to 20 decimal places. ... This page was last edited on 25 February ...

  4. Decimal - Wikipedia

    en.wikipedia.org/wiki/Decimal

    or "," as in 25.9703 or 3,1415). [3] Decimal may also refer ... The Hungarian language also uses a straightforward decimal system. All numbers between 10 and 20 are ...

  5. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    Covers the ten decimal digits and all letters of the English alphabet, apart from not distinguishing 0 from O. 36: Hexatrigesimal [57] [58] Covers the ten decimal digits and all letters of the English alphabet. 37: Covers the ten decimal digits and all letters of the Spanish alphabet. 38: Covers the duodecimal digits and all letters of the ...

  6. Numeral prefix - Wikipedia

    en.wikipedia.org/wiki/Numeral_prefix

    binary, ternary, octal, decimal, hexadecimal (numbers expressed in base 2, base 3, base 8, base 10, base 16) septuagenarian, octogenarian (a person 70–79 years old, 80–89 years old) centipede , millipede (subgroups of arthropods with around 100 feet, or around 1 000 feet)

  7. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    Evidence of base-20 counting systems is also found in the languages of central and ... (3 0 and 3 3) on the other, then its weight in decimal is 25 or 10 1 1 in ...

  8. Decimal representation - Wikipedia

    en.wikipedia.org/wiki/Decimal_representation

    The decimal expansion of non-negative real number x will end in zeros ... For example, 36 ⁄ 25 = 1.44 = 1.4400000 ... This page was last edited on 20 November 2024, ...

  9. 20 (number) - Wikipedia

    en.wikipedia.org/wiki/20_(number)

    In some countries, the number 20 is used as an index in measuring visual acuity. 20/20 indicates normal vision at 20 feet, although it is commonly used to mean "perfect vision" in countries using the Imperial system. (The metric equivalent is 6/6.)