100 (number)

# 100 (number)

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100 (one hundred) (Roman numeral
Roman numerals
The numeral system of ancient Rome, or Roman numerals, uses combinations of letters from the Latin alphabet to signify values. The numbers 1 to 10 can be expressed in Roman numerals as:...

C, for centum) is the natural number
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...

following 99
99 (number)
99 is the natural number following 98 and preceding 100.-Mathematics:99 is the ninth repdigit, a palindromic number and a Kaprekar number...

and preceding 101
101 (number)
101 is the natural number following 100 and preceding 102.It is variously pronounced "one hundred and one" / "a hundred and one", "one hundred one" / "a hundred one", and "one oh one"...

.

## In mathematics

One hundred is the square of 10
10 (number)
10 is an even natural number following 9 and preceding 11.-In mathematics:Ten is a composite number, its proper divisors being , and...

(in scientific notation
Scientific notation
Scientific notation is a way of writing numbers that are too large or too small to be conveniently written in standard decimal notation. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists, mathematicians, doctors, and engineers.In scientific...

it is written as 102). The standard SI prefix
SI prefix
The International System of Units specifies a set of unit prefixes known as SI prefixes or metric prefixes. An SI prefix is a name that precedes a basic unit of measure to indicate a decadic multiple or fraction of the unit. Each prefix has a unique symbol that is prepended to the unit symbol...

for a hundred is "hecto-".

One hundred is the basis of percentage
Percentage
In mathematics, a percentage is a way of expressing a number as a fraction of 100 . It is often denoted using the percent sign, “%”, or the abbreviation “pct”. For example, 45% is equal to 45/100, or 0.45.Percentages are used to express how large/small one quantity is, relative to another quantity...

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

It is the sum of the first nine prime number
Prime number
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number. For example 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2...

s, as well as the sum of four pairs of prime numbers (47 + 53, 17 + 83, 3 + 97, 41 + 59), and the sum of the cubes of the first four integers (100 = 13 + 23 + 33 + 43). Also, 26 + 62 = 100, thus 100 is a Leyland number
Leyland number
In number theory, a Leyland number is a number of the form xy + yx, where x and y are integers greater than 1. The first few Leyland numbers are...

.

One hundred is also an 18-gonal number
Polygonal number
In mathematics, a polygonal number is a number represented as dots or pebbles arranged in the shape of a regular polygon. The dots were thought of as alphas . These are one type of 2-dimensional figurate numbers.- Definition and examples :...

. It is divisible by the number of primes below it, 25 in this case. But it can not be expressed as the difference between any integer and the total of coprime
Coprime
In number theory, a branch of mathematics, two integers a and b are said to be coprime or relatively prime if the only positive integer that evenly divides both of them is 1. This is the same thing as their greatest common divisor being 1...

s below it, making it a noncototient
Noncototient
In mathematics, a noncototient is a positive integer n that cannot be expressed as the difference between a positive integer m and the number of coprime integers below it. That is, m − φ = n, where φ stands for Euler's totient function, has no solution for m...

. However, it can be expressed as a sum of some of its divisors, making it a semiperfect number
Semiperfect number
In number theory, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. A semiperfect number that is equal to the sum of all its proper divisors is a perfect number....

.

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 were defined by D. R. Kaprekar, a mathematician from India. The word "Harshad" comes from the Sanskrit + , meaning joy-giver. The Niven...

in base 10, and also in base 4, and in that base it is a self-descriptive number
Self-descriptive number
A self-descriptive number is an integer m that in a given base b is b-digits long in which each digit d at position n counts how many instances of digit n are in m.For example, in base 10, the number 6210001000 is self-descriptive because of the following...

.

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.

## In science

The atomic number of fermium
Fermium
Fermium is a synthetic element with the symbol Fm. It is the 100th element in the periodic table and a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities,...

is 100.

On the Celsius
Celsius
Celsius is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death...

scale, 100 degrees is the boiling temperature of pure water
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...

at sea level
Sea level
Mean sea level is a measure of the average height of the ocean's surface ; used as a standard in reckoning land elevation...

.

## In Religion

• There are 100 blasts of the Shofar
Shofar
A shofar is a horn, traditionally that of a ram, used for Jewish religious purposes. Shofar-blowing is incorporated in synagogue services on Rosh Hashanah and Yom Kippur.Shofar come in a variety of sizes.- Bible and rabbinic literature :...

heard in the service of Rosh Hashana, the Jewish New Year.
• A religious Jewish person is expected to utter at least 100 blessings daily.

## In money

Most of the world's currencies
Currency
In economics, currency refers to a generally accepted medium of exchange. These are usually the coins and banknotes of a particular government, which comprise the physical aspects of a nation's money supply...

are divided into 100 subunits; for example, one euro
Euro
The euro is the official currency of the eurozone: 17 of the 27 member states of the European Union. It is also the currency used by the Institutions of the European Union. The eurozone consists of Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg,...

is one hundred cents and one pound sterling
Pound sterling
The pound sterling , commonly called the pound, is the official currency of the United Kingdom, its Crown Dependencies and the British Overseas Territories of South Georgia and the South Sandwich Islands, British Antarctic Territory and Tristan da Cunha. It is subdivided into 100 pence...

is one hundred pence.

The U.S. hundred-dollar bill
United States one hundred-dollar bill
The United States one hundred-dollar bill is a denomination of United States currency. U.S. statesman, inventor and diplomat Benjamin Franklin is currently featured on the obverse of the bill. On the reverse of the banknote is an image of Independence Hall. The time on the clock according to the...

has Benjamin Franklin
Benjamin Franklin
Dr. Benjamin Franklin was one of the Founding Fathers of the United States. A noted polymath, Franklin was a leading author, printer, political theorist, politician, postmaster, scientist, musician, inventor, satirist, civic activist, statesman, and diplomat...

's portrait; the "Benjamin" is the largest U.S. bill in print. American savings bonds of \$100 have Thomas Jefferson
Thomas Jefferson
Thomas Jefferson was the principal author of the United States Declaration of Independence and the Statute of Virginia for Religious Freedom , the third President of the United States and founder of the University of Virginia...

's portrait, while American \$100 treasury bonds have Andrew Jackson
Andrew Jackson
Andrew Jackson was the seventh President of the United States . Based in frontier Tennessee, Jackson was a politician and army general who defeated the Creek Indians at the Battle of Horseshoe Bend , and the British at the Battle of New Orleans...

's portrait.

## In other fields

One hundred is also:
• The number of years in a century
Century
A century is one hundred consecutive years. Centuries are numbered ordinally in English and many other languages .-Start and end in the Gregorian Calendar:...

• The number of pounds in an American short hundredweight
Hundredweight
The hundredweight or centum weight is a unit of mass defined in terms of the pound . The definition used in Britain differs from that used in North America. The two are distinguished by the terms long hundredweight and short hundredweight:* The long hundredweight is defined as 112 lb, which...

• The number of tiles in a standard Scrabble
Scrabble
Scrabble is a word game in which two to four players score points by forming words from individual lettered tiles on a game board marked with a 15-by-15 grid. The words are formed across and down in crossword fashion and must appear in a standard dictionary. Official reference works provide a list...

set for the languages, English, Arabic, Catalan, Czech, Danish, Esperanto, Finnish, Hungarian, Irish, Latin, Malaysian, Norwegian, Polish, Romanian, Slovak, Slovenian, Spanish, Swedish, Turkish
• In Greece
Greece
Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

, India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, Israel
Israel
The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...

and Nepal
Nepal
Nepal , officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia. It is located in the Himalayas and bordered to the north by the People's Republic of China, and to the south, east, and west by the Republic of India...

, 100 is the police telephone number.
• In Belgium
Belgium
Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

, 100 is the ambulance and firefighter telephone number.
• In United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, 100 is the operator
Telephone operator
A telephone operator is either* a person who provides assistance to a telephone caller, usually in the placing of operator assisted telephone calls such as calls from a pay phone, collect calls , calls which are billed to a credit card, station-to-station and person-to-person calls, and certain...

telephone number
• Hundred Days
Hundred Days
The Hundred Days, sometimes known as the Hundred Days of Napoleon or Napoleon's Hundred Days for specificity, marked the period between Emperor Napoleon I of France's return from exile on Elba to Paris on 20 March 1815 and the second restoration of King Louis XVIII on 8 July 1815...

, aka the Waterloo
Battle of Waterloo
The Battle of Waterloo was fought on Sunday 18 June 1815 near Waterloo in present-day Belgium, then part of the United Kingdom of the Netherlands...

Campaign
• "The First Hundred Days" is an arbitrary benchmark of a President of the United States
President of the United States
The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

' performance at the beginning of his or her term.
• 100 is the HTTP status code indicating that the client should continue with its request

## In entertainment

When a TV series reaches 100 episodes
100 episodes
In the U.S. television industry, 100 episodes is the traditional threshold at which point a television series becomes viable for syndication. 100 episodes are advantageous for stripped syndication because such shows can be sold for higher per-episode pricing; it also allows for 20 weeks of...

, it is generally considered viable for syndication. (For shows picked up midseason, this point is generally reached during a prime time series' 5th season).

## In sports

• The number of yards in an American football
American football
American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...

field (not including the end zones).
• The number of runs required for a cricket
Cricket
Cricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...

batsman to score a century
Century (cricket)
In the sport of cricket, a batsman reaches his century when he scores 100 or more runs in a single innings. The term is also included in "century partnership" which occurs when two batsmen add 100 runs to the team total when they are batting together. A century is regarded as a landmark score for...

, a significant milestone.
• The number of points required for a snooker
Snooker
Snooker is a cue sport that is played on a green baize-covered table with pockets in each of the four corners and in the middle of each of the long side cushions. A regular table is . It is played using a cue and snooker balls: one white , 15 worth one point each, and six balls of different :...

cueist to score a century break, a significant milestone.
• The record number of points scored in one NBA
The National Basketball Association is the pre-eminent men's professional basketball league in North America. It consists of thirty franchised member clubs, of which twenty-nine are located in the United States and one in Canada...

game
Wilt Chamberlain's 100-point game
Wilt Chamberlain's 100-point game, named by the National Basketball Association as one of its greatest games, was a regular-season game between the Philadelphia Warriors and the New York Knicks held on March 2, 1962, at Hersheypark Arena in Hershey, Pennsylvania.The Warriors won the game 169-147,...

by a single player, set by Wilt Chamberlain
Wilt Chamberlain
Wilton Norman "Wilt" Chamberlain was an American professional NBA basketball player for the Philadelphia/San Francisco Warriors, the Philadelphia 76ers and the Los Angeles Lakers; he also played for the Harlem Globetrotters prior to playing in the NBA...

Golden State Warriors
The Golden State Warriors are an American professional basketball team based in Oakland, California. They are part of the Pacific Division of the Western Conference in the National Basketball Association...

on March 2, 1962 I
• The minimum distance in yard
Yard
A yard is a unit of length in several different systems including English units, Imperial units and United States customary units. It is equal to 3 feet or 36 inches...

s for a Par 3 on a golf course
Golf course
A golf course comprises a series of holes, each consisting of a teeing ground, fairway, rough and other hazards, and a green with a flagstick and cup, all designed for the game of golf. A standard round of golf consists of playing 18 holes, thus most golf courses have this number of holes...

• AFI's 100 Years...
• 100 Greatest Britons
100 Greatest Britons
100 Greatest Britons was broadcast in 2002 by the BBC. The programme was the result of a vote conducted to determine whom the United Kingdom public considers the greatest British people in history. The series, Great Britons, included individual programmes on the top ten, with viewers having further...

• 100 Greatest Christmas Moments
• 100 Greatest Kids' TV shows
• Hundred (division)
• Hundred (word)
Hundred (word)
Today in English, a hundred is always taken to be equal to 100. However, before the 18th century, it could mean other values, depending on the objects being counted. Sometimes the value of 100 was referred to as a small hundred and the larger value of 120 was referred to as a long hundred...

• Hundred Days
Hundred Days (disambiguation)
The Hundred Days was Napoleon Bonaparte's final military campaign in 1815.Hundred Days may also refer to:* Hundred Days Offensive, the final Allied offensive on the Western Front during the World War I...

• Hundred Years' War
Hundred Years' War
The Hundred Years' War was a series of separate wars waged from 1337 to 1453 by the House of Valois and the House of Plantagenet, also known as the House of Anjou, for the French throne, which had become vacant upon the extinction of the senior Capetian line of French kings...

• List of highways numbered 100
• Top 100
Top 100
Top 100 may refer to:*Billboard Hot 100, the United States music industry standard singles popularity chart issued weekly by Billboard magazine...

• The Top 100 Crime Novels of All Time
The Top 100 Crime Novels of All Time
The Top 100 Crime Novels of All Time is a list published in book form in 1990 by the British-based Crime Writers' Association. Five years later, the Mystery Writers of America published a similar list entitled The Top 100 Mystery Novels of All Time...

• Top 100 winning pitchers of all time
• 100 Most Influential Books Ever Written