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100

From Wikipedia, the free encyclopedia
"Hundred" redirects here. For other uses, see100 (disambiguation) andHundred (disambiguation).
Natural number
← 99100 101 →
Cardinalonehundred
Ordinal100th
(one hundredth)
Factorization22 × 52
Divisors1, 2, 4, 5, 10, 20, 25, 50, 100
Greek numeralΡ´
Roman numeralC, c
Roman numeral (unicode)Ⅽ, ⅽ, C, c
Binary11001002
Ternary102013
Senary2446
Octal1448
Duodecimal8412
Hexadecimal6416
Greek numeralρ
Arabic١٠٠
Bengali১০০
Chinese numeral佰,百
Devanagari१००
Hebrewק
Khmer១០០
ArmenianՃ
Tamil௱, க௦௦
Thai๑๐๐
Egyptian hieroglyph𓍢
Babylonian cuneiform𒐕𒐏

100 orone hundred (Roman numeral:C)[1] is thenatural number following99 and preceding101.

In mathematics

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100 as the sum of the first positive cubes

100 is the square of10 (inscientific notation it is written as 102). The standardSI prefix for a hundred is "hecto-".

100 is the basis ofpercentages (per centum meaning "by the hundred" inLatin), with 100% being a full amount.

100 is aHarshad number indecimal, and also in base-four, a base in-which it is also aself-descriptive number.[2][3]

100 is the sum of the first nineprime numbers, from2 through23.[4] It is also divisible by the number of primes below it,25.[5]

100 cannot be expressed as the difference between any integer and the total ofcoprimes below it, making it anoncototient.[6]

100 has areduced totient of 20, and anEuler totient of 40.[7][8] A totient value of 100 is obtained from four numbers:101,125,202, and250.

100 can be expressed as a sum of some of its divisors, making it asemiperfect number.[9] Thegeometric mean of its nine divisors is10.

100 is the sum of thecubes of the first four positiveintegers (100 = 13 + 23 + 33 + 43).[10] This is related byNicomachus's theorem to the fact that 100 also equals the square of the sum of the first four positive integers:100 = 102 = (1 + 2 + 3 + 4)2.[11]

100 = 26 + 62, thus 100 is the seventhLeyland number.[12] 100 is also the seventeenthErdős–Woods number, and the fourth 18-gonal number.[13][14]

It is the 10thstar number[15] (whosedigit sum also adds to 10 indecimal).

In history

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In money

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Hundred rupee note India

Most of the world'scurrencies are divided into 100 subunits. For example, oneeuro is one hundred cents and onepound sterling is one hundred pence.

By specification,100 euro notes feature a picture of a Rococo gateway on the obverse and a Baroque bridge on the reverse.

TheU.S. hundred-dollar bill, Series 2009

TheUnited States one-hundred-dollar bill hasBenjamin Franklin's portrait; this "Benjamin" is the largest Americanbanknote in circulation.

In other fields

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Computers & Software

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Science & Measurement

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Inzoology, the group ofcentipedes (Chilopoda) is classified as a subclass ofmillipedes. Centipedes are characterised by having between 15 and 191 pairs of legs. Although the name refers to "hundred", the actual number varies gradually.

With regard to the biological value ofproteins, the number 100 is used as a reference value: the biological value of a protein is measured by how well thedietary protein can be converted into the body's own protein. Thechicken egg was arbitrarily set at a value of 100, and other proteins are evaluated relative to this.

Anders Celsius defined 100° as the boiling point and 0° as the melting point of water for his temperature scale. In 1744, shortly after Celsius' death, the modern Celsius scale was introduced byCarl von Linné, in which theboiling point of water is assigned the value 100°C and the freezing point the value 0°C.

Sports

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Culture

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  • 100 emoji 💯: Is commonly used to represent something excellent or perfect.

See also

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References

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  1. ^Reinforced by but not originally derived fromLatincentum.
  2. ^"Sloane's A005349 : Niven (or Harshad) numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-27.
  3. ^Sloane, N. J. A. (ed.)."Sequence A108551 (Self-descriptive numbers in various bases represented in base 10)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-12-08.
  4. ^Sloane, N. J. A. (ed.)."Sequence A007504 (Sum of the first n primes.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^Sloane, N. J. A. (ed.)."Sequence A057809 (Numbers n such that pi(n) divides n.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^Sloane, N. J. A. (ed.)."Sequence A005278 (Noncototients)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-12-08.
  7. ^Sloane, N. J. A. (ed.)."Sequence A002322 (Reduced totient function)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-12-08.
  8. ^Sloane, N. J. A. (ed.)."Sequence A000010 (Euler totient function)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  9. ^Sloane, N. J. A. (ed.)."Sequence A005835 (Pseudoperfect (or semiperfect) numbers n)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-12-08.
  10. ^Sloane, N. J. A. (ed.)."Sequence A025403 (Numbers that are the sum of 4 positive cubes in exactly 1 way.)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-12-08.
  11. ^Sloane, N. J. A. (ed.)."Sequence A000537 (Sum of first n cubes; or n-th triangular number squared)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  12. ^"Sloane's A076980 : Leyland numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-27.
  13. ^Sloane, N. J. A. (ed.)."Sequence A059756 (Erdős-Woods numbers: the length of an interval of consecutive integers with property that every element has a factor in common with one of the endpoints)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2022-11-30.
  14. ^"Sloane's A051870 : 18-gonal numbers".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-27.
  15. ^Sloane, N. J. A. (ed.)."Sequence A003154".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2023-09-02.
  16. ^seeDuodecimal § Origin

External links

[edit]
Look uphundred in Wiktionary, the free dictionary.
Wikimedia Commons has media related to100 (number).
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