100 or one hundred ( Roman numeral: C) is the natural number following 99 and preceding

101 101 may refer to: * 101 (number), the number * AD 101, a year in the 2nd century AD * 101 BC, a year in the 2nd century BC It may also refer to: Entertainment * ''101'' (album), a live album and documentary by Depeche Mode * "101" (song), a ...

. In medieval contexts, it may be described as the short hundred or five

score Score or scorer may refer to: *Test score, the result of an exam or test Business * Score Digital, now part of Bauer Radio * Score Entertainment, a former American trading card design and manufacturing company * Score Media, a former Canadian m ...

in order to differentiate the English and Germanic use of "hundred" to describe the long hundred of six

or 120.

In mathematics

100 is the square of 10 (in scientific notation it is written as 10²). The standard

SI prefix The International System of Units, known by the international abbreviation SI in all languages and sometimes pleonastically as the SI system, is the modern form of the metric system and the world's most widely used system of measurement. E ...

for a hundred is "

hecto ''Hecto'' (symbol: h) is a decimal unit prefix in the metric system denoting a factor of one hundred. It was adopted as a multiplier in 1795, and comes from the Greek , meaning "hundred". In 19th century English it was sometimes spelled "hecato", ...

-". 100 is the basis of

percentage In mathematics, a percentage (from la, per centum, "by a hundred") is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", although the abbreviations "pct.", "pct" and sometimes "pc" are also us ...

s (''per cent'' meaning "per hundred" in Latin), with 100% being a full amount. 100 is a

Harshad number In mathematics, a harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that base. Harshad numbers in base are also known as -harshad (or -Niven) numbers. Harshad numbers ...

decimal The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral ...

, and also in base-four, a base in-which it is also a self-descriptive number. 100 is the sum of the first nine prime numbers, from 2 through 23. It is also divisible by the number of primes below it, 25. 100 cannot be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient. 100 has a reduced totient of 20, and an Euler totient of 40. A totient value of 100 is obtained from four numbers:

125 125 may refer to: * 125 (number), a natural number *AD 125, a year in the 2nd century AD * 125 BC, a year in the 2nd century BC *125 (dinghy) * 125 (New Jersey bus) See also * 12/5 (disambiguation) * Unbipentium An extended periodic table the ...

202 Year 202 (Roman numerals, CCII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Severus and Antoninus (or, less frequently, year 955 '' ...

, and

250 __NOTOC__ Year 250 ( CCL) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Traianus and Gratus (or, less frequently, year 1003 ''Ab u ...

. 100 can be expressed as a sum of some of its divisors, making it a semiperfect number. The

geometric mean In mathematics, the geometric mean is a mean or average which indicates a central tendency of a set of numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum). The geometric mean is defined as the ...

of its nine divisors is 10. 100 is the sum of the cubes of the first four positive integers (100 = 1³ + 2³ + 3³ + 4³). This is related by

Nicomachus's theorem In number theory, the sum of the first cubes is the square of the th triangular number. That is, :1^3+2^3+3^3+\cdots+n^3 = \left(1+2+3+\cdots+n\right)^2. The same equation may be written more compactly using the mathematical notation for summa ...

to the fact that 100 also equals the square of the sum of the first four positive integers: . 100 = 2⁶ + 6², thus 100 is the seventh Leyland number. 100 is also the seventeenth Erdős–Woods number, and the fourth 18- gonal number. There are exactly 100 prime numbers in base-ten whose digits are in strictly ascending order (e.g. 239, 2357 etc.). The last such prime number is 23456789, which contains eight consecutive integers as digits.

In science

One hundred is the atomic number of fermium, an actinide and the last of the

heavy metals upright=1.2, Crystals of osmium, a heavy metal nearly twice as dense as lead">lead.html" ;"title="osmium, a heavy metal nearly twice as dense as lead">osmium, a heavy metal nearly twice as dense as lead Heavy metals are generally defined as ...

that can be created through neutron bombardment. On the

Celsius The degree Celsius is the unit of temperature on the Celsius scale (originally known as the centigrade scale outside Sweden), one of two temperature scales used in the International System of Units (SI), the other being the Kelvin scale. The ...

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

Kármán line The Kármán line (or von Kármán line ) is an attempt to define a boundary between Earth's atmosphere and outer space, and offers a specific definition set by the Fédération aéronautique internationale (FAI), an international record-keeping ...

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 religion

*There are 100 blasts of the Shofar heard in the service of Rosh Hashana, the Jewish New Year. *A religious Jew is expected to utter at least 100 blessings daily. *In the

Hindu Hindus (; ) are people who religiously adhere to Hinduism.Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pages 35–37 Historically, the term has also been used as a geographical, cultural, and later religious identifier for ...

epic of the Mahabharata, the king Dhritarashtra had 100 sons known as the Kauravas.

In politics

* The

Hundred (county division) A hundred is an administrative division that is geographically part of a larger region. It was formerly used in England, Wales, some parts of the United States, Denmark, Southern Schleswig, Sweden, Finland, Norway, the Bishopric of Ösel–Wiek, C ...

is a largely historical division of a county or similar larger administrative unit. * The United States Senate has 100 Senators.

In money

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

pound sterling Sterling (abbreviation: stg; Other spelling styles, such as STG and Stg, are also seen. ISO code: GBP) is the currency of the United Kingdom and nine of its associated territories. The pound ( sign: £) is the main unit of sterling, and t ...

is one hundred pence. By specification,

100 euro note The one hundred euro note (€100) is one of the higher value euro banknotes and has been used since the introduction of the euro (in its cash form) in 2002. The note is used daily by some 343 million Europeans and in the 25 countries which ...

s feature a picture of a Rococo gateway on the obverse and a Baroque bridge on the reverse. New100front

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.

In other fields

One hundred is also: * The number of years in a

century A century is a period of 100 years. Centuries are numbered ordinally in English and many other languages. The word ''century'' comes from the Latin ''centum'', meaning ''one hundred''. ''Century'' is sometimes abbreviated as c. A centennial or ...

. * The number of centimeters in a meter. * The number of pounds in an American short hundredweight. * In Greece, India, Israel and Nepal, 100 is the police telephone number. * In Belgium, 100 is the ambulance and firefighter telephone number. * In United Kingdom, 100 is the

operator Operator may refer to: Mathematics * A symbol indicating a mathematical operation * Logical operator or logical connective in mathematical logic * Operator (mathematics), mapping that acts on elements of a space to produce elements of another ...

telephone number. * The

HTTP status code This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specification ...

indicating that the client should continue with its request. * The age at which a person becomes a centenarian.

In sports

* The number of yards in an American football field (not including the end zones). * The number of points required for a

snooker Snooker (pronounced , ) is a cue sports, cue sport played on a Billiard table#Snooker and English billiards tables, rectangular table covered with a green cloth called baize, with six Billiard table#Pockets 2, pockets, one at each corner and o ...

player to score a century break, a significant milestone. * The record number of points scored in one

NBA The National Basketball Association (NBA) is a professional basketball league in North America. The league is composed of 30 teams (29 in the United States and 1 in Canada) and is one of the major professional sports leagues in the United St ...

game A game is a structured form of play (activity), play, usually undertaken for enjoyment, entertainment or fun, and sometimes used as an educational tool. Many games are also considered to be work (such as professional players of spectator s ...

by a single player, set by Wilt Chamberlain of the

Philadelphia Warriors The history of the Golden State Warriors began in Philadelphia in 1946. In 1962, the franchise was relocated to San Francisco, California and became known as the San Francisco Warriors until 1971, when its name was changed to the current Golden St ...

on March 2, 1962. * The

100-yard dash 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1 ...

and the

100-metre dash The 100 metres, or 100-meter dash, is a sprint race in track and field competitions. The shortest common outdoor running distance, the dash is one of the most popular and prestigious events in the sport of athletics. It has been contest ...

are sprint track events. * The

100-kilometre walk The 100-kilometer race walk is a racewalking event. The event is competed as a road race. Athletes must always keep in contact with the ground and the supporting leg must remain straight until the raised leg passes it. 100 kilometers is 62.14 m ...

is a racewalking event. * The Hundred (cricket), a 100-ball cricket competition.

References

* Wells, D. '' The Penguin Dictionary of Curious and Interesting Numbers'' London: Penguin Group. (1987): 133

External links

* * {{DEFAULTSORT:100 (Number) Integers