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80 (number)





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80 (eighty) is the natural number following 79 and preceding 81.

← 79 80 81 →

80 81 82 83 84 85 86 87 88 89

  • Integers
  • 0 10 20 30 40 50 60 70 80 90

    Cardinaleighty
    Ordinal80th
    (eightieth)
    Factorization24 × 5
    Divisors1, 2, 4, 5, 8, 10, 16, 20, 40, 80
    Greek numeralΠ´
    Roman numeralLXXX
    Binary10100002
    Ternary22223
    Senary2126
    Octal1208
    Duodecimal6812
    Hexadecimal5016
    ArmenianՁ
    Hebrewפ / ף
    Babylonian numeral𒐕⟪
    Egyptian hieroglyph𓎍

    In mathematics

    80 is:

    The Pareto principle (also known as the 80-20 rule) states that, for many events, roughly 80% of the effects come from 20% of the causes.[3][4]

    Every solvable configuration of the 15 puzzle can be solved in no more than 80 single-tile moves.[5]

    In science

     
    Element 80: Mercury (Hg)

    In religion

    In other fields

    Eighty is also:

    See also

    References

    1. ^ "Sloane's A005835 : Pseudoperfect (or semiperfect) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  • ^ "Sloane's A000179 : Ménage numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  • ^ Bunkley, Nick (March 3, 2008). "Joseph Juran, 103, Pioneer in Quality Control, Dies". The New York Times..
  • ^ "What is 80/20 Rule, Pareto's Law, Pareto Principle". Archived from the original on 2013-01-28. Retrieved 2017-05-20..
  • ^ A. Brüngger, A. Marzetta, K. Fukuda and J. Nievergelt, The parallel search bench ZRAM and its applications, Annals of Operations Research 90 (1999), pp. 45–63.

  • Retrieved from "https://en.wikipedia.org/w/index.php?title=80_(number)&oldid=1216548186"
     



    Last edited on 31 March 2024, at 17:22  





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    This page was last edited on 31 March 2024, at 17:22 (UTC).

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