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100 (number)

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100 or one hundred (Roman numeral: )[1] is the natural number following 99 and preceding 101.

← 99 100 101 →
Cardinalone hundred
Ordinal100th
(one hundredth)
Factorization22× 52
Divisors1, 2, 4, 5, 10, 20, 25, 50, 100
Greek numeralΡ´
Roman numeralC
Unicode symbol(s)C, ⅽ
Binary11001002
Ternary102013
Quaternary12104
Quinary4005
Senary2446
Octal1448
Duodecimal8412
Hexadecimal6416
Vigesimal5020
Base 362S36
Greek numeralρ
Arabic١٠٠
Bengali১০০
Chinese numeral佰,百
Devanagari१००
Hebrewק (Kuf)
Khmer១០០
Korean
Tamil௱, க00
Thai๑๐๐

In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to describe the long hundred of six score or 120.

Contents

In mathematicsEdit

100 is the square of 10 (in scientific notation it is written as 102). The standard SI prefix for a hundred is "hecto-".

100 is the basis of percentages (per cent meaning "per hundred" in Latin), with 100% being a full amount.

100 is the sum of the first nine prime numbers, as well as the sum of some pairs of prime numbers e.g., 3 + 97, 11 + 89, 17 + 83, 29 + 71, 41 + 59, and 47 + 53.

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

26 + 62 = 100, thus 100 is a Leyland number.[3]

100 is an 18-gonal number.[4] It is divisible by 25, the number of primes below it. It can not be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient. It can be expressed as a sum of some of its divisors, making it a semiperfect number.

100 is a Harshad number in base 10,[5] and also in base 4, and in that base it is a self-descriptive number.

There are exactly 100 prime numbers whose digits are in strictly ascending order (e.g. 239, 2357 etc.).

100 is the smallest number whose common logarithm is a prime number (i.e. 10n for which n is prime).

In scienceEdit

One hundred is the atomic number of fermium, an actinide and the first of the heavy metals that cannot be created through neutron bombardment.

On the Celsius scale, 100 degrees is the boiling temperature of pure water at sea level.

The Kármán line lies at an altitude of 100 kilometres above the Earth's sea level and is commonly used to define the boundary between Earth's atmosphere and outer space.

In religionEdit

In politicsEdit

In moneyEdit

Most of the world's currencies are divided into 100 subunits; for example, one euro is one hundred cents and one pound sterling is one hundred pence.

The 100 Euro banknotes feature a picture of a Rococo gateway on the obverse and a Baroque bridge on the reverse.

The U.S. hundred-dollar bill has Benjamin Franklin's portrait; the "Benjamin" is the largest U.S. bill in print. American savings bonds of $100 have Thomas Jefferson's portrait, while American $100 treasury bonds have Andrew Jackson's portrait.

 
The U.S. hundred-dollar bill, Series 2009.

In other fieldsEdit

One hundred is also:

In sportsEdit

See alsoEdit

ReferencesEdit

  1. ^ Reïnforced by but not originally derived from Latin centum.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A000537 (Sum of first n cubes; or n-th triangular number squared)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ "Sloane's A076980 : Leyland numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  4. ^ "Sloane's A051870 : 18-gonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  5. ^ "Sloane's A005349 : Niven (or Harshad) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-27.
  6. ^ Insights, September 28, 2011.
  7. ^ Leo Rosten, The Joys of Yiddish (1968), page 52.
  8. ^ Grasso, John (2013), Historical Dictionary of Football, Scarecrow Press, p. 133, ISBN 9780810878570.
  9. ^ Wisden Cricketers’ Almanack 2011, pp. 1270-72, lists of double hundreds, hundreds, fastest hundreds etc., ed. Scyld Berry, pub John Wisden & Co Ltd. (April 2011). ISBN 978-1-4081-3130-5.
  10. ^ ESPN Cricinfo list of centuries http://stats.espncricinfo.com/ci/engine/records/index.html?category=3;class=1
  11. ^ Wilt Chamberlain. (14 September 2010). In Basketball Legend Chamberlain Dies at 63. Retrieved September 14, 2010 from https://www.washingtonpost.com/wp-srv/sports/nba/daily/oct99/13/chamberlain13.htm

External linksEdit