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This article is about the number. For the year, see 3. Year 3 ( III) was a Common year starting on Monday (link will display the full calendar of the Julian calendar. For other uses, see 3 (disambiguation).
3

0 1 2 3 4 5 6 7 8 9 →

0 10 20 30 40 50 60 70 80 90 →
Cardinal 3
three
Ordinal 3rd
third
Numeral system ternary
Factorization prime
Divisors 1, 3
Roman numeral III
Roman numeral (Unicode) Ⅲ, ⅲ
Arabic ٣
Ge'ez ፫
Bengali ৩
Chinese numeral 三
Devanāgarī ३
Hebrew ג (Gimel)
Khmer ៣
Thai ๓
prefixes tri- (from Greek)

tre-/ter- (from Latin)
Binary 11
Octal 3
Duodecimal 3
Hexadecimal 3

3 (three) is a number, numeral, and glyph. Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity In mathematics Two has many properties in Mathematics. An Integer is called Even if it is divisible by 2 In mathematics Four is the smallest Composite number, its proper Divisors being and. This article discusses the number five. For the year 5 AD see 5. In mathematics Six is the second smallest Composite number, its proper Divisors being 1, 2 and 3. In mathematics Seven is the fourth Prime number. It is not only a Mersenne prime (since 23 &minus 1 = 7 but also a In mathematics 8 is a Composite number, its Proper divisors being 1, 2, and 4. In mathematics Nine is a Composite number, its proper Divisors being 1 and 3. This is a list of articles about Numbers ( not about Numerals. The integers (from the Latin integer, literally "untouched" hence "whole" the word entire comes from the same origin but via French "Twenty" redirects here For the village in England, see Twenty Lincolnshire. 30 ( thirty) is the Natural number following 29 and preceding 31. 40 ( forty) is the Natural number following 39 and preceding 41. This article discusses the number fifty. For the year 50 CE see 50. 60 ( sixty) is the Natural number following 59 and preceding 61. 70 ( seventy) is the Natural number following 69 and preceding 71. 80 ( eighty) is the Natural number following 79 and preceding 81. 90 ( ninety) is the Natural number preceded by 89 and followed by 91. This article describes cardinal numbers in mathematics For cardinals in linguistics see Names of numbers in English. In linguistics ordinal numbers are the words representing the rank of a number with respect to some order in particular order or position (i A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner Ternary or trinary is the base - Numeral system. Analogous to a " Bit " a ternary digit is known as a trit ( In Mathematics, factorization ( also factorisation in British English) or factoring is the decomposition of an object (for In Mathematics, a prime number (or a prime) is a Natural number which has exactly two distinct natural number Divisors 1 In Mathematics, a divisor of an Integer n, also called a factor of n, is an integer which evenly divides n without Roman numerals are a Numeral system originating in ancient Rome, adapted from Etruscan numerals. Arabic (ar الْعَرَبيّة (informally ar عَرَبيْ) in terms of the number of speakers is the largest living member of the Semitic language Ge'ez (gez ግዕዝ) also called Ethiopic, is an Abugida script that was originally developed to write Ge'ez, a Semitic language Chinese numerals are characters for writing Numbers in Chinese. Khmer numerals are the numerals used in the Khmer language of Cambodia. Thai (th ภาษาไทย, transcription: phasa thai, transliteration:; pʰāːsǎːtʰāj is the national and Numerical prefixes are usually derived from the words for numbers in various languages most commonly Greek and Latin, although this is not always the case Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. The binary numeral system, or base-2 number system, is a Numeral system that represents numeric values using two symbols usually 0 and 1. The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 The duodecimal system (also known as base -12 or dozenal) is a Numeral system using twelve as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a A number is an Abstract object, tokens of which are Symbols used in Counting and measuring. A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner A glyph is an element of writing Two or more glyphs representing the same symbol whether interchangeable or context-dependent are called Allographs the abstract unit they It is the natural number following 2 and preceding 4. In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an In mathematics Two has many properties in Mathematics. An Integer is called Even if it is divisible by 2 In mathematics Four is the smallest Composite number, its proper Divisors being and.

Contents

In mathematics

Three is the first odd prime number, and the second smallest prime. In Mathematics, a prime number (or a prime) is a Natural number which has exactly two distinct natural number Divisors 1 It is both the first Fermat prime (22º + 1) and the first Mersenne prime (2² - 1), as well as the first lucky prime. In Mathematics, a Fermat number, named after Pierre de Fermat who first studied them is a positive integer of the form F_{n} = 2^{2^{ In Mathematics, a Mersenne number is a positive integer that is one less than a Power of two: M_n=2^n-1 In Number theory, a lucky number is a Natural number in a set which is generated by a " sieve " similar to the Sieve of Eratosthenes However, it's the second Sophie Germain prime, the second Mersenne prime exponent, the second factorial prime (2! + 1), the second Lucas prime, the second Stern prime. In Number theory, a Prime number p is a Sophie Germain prime if 2 p  + 1 is also prime A factorial prime is a Prime number that is one less or one more than a Factorial (all factorials above 1 are even The Lucas numbers are an Integer sequence named after the mathematician François Édouard Anatole Lucas (1842&ndash1891 who studied both that sequence and the A Stern prime, named for Moritz Abraham Stern, is a Prime number that is not the sum of a smaller prime and twice the square of a nonzero Integer

Three is the first unique prime due to the properties of its reciprocal. In Mathematics, a unique prime is a certain kind of Prime number.

Three is the third Heegner number. In Number theory, a Heegner number is a (square-free Positive integer d such that the Imaginary quadratic field \mathbf{Q}(\sqrt{-d} has

Three is the second triangular number and it is the only prime triangular number. A triangular number is the sum of the n Natural numbers from 1 to n. Three is the only prime which is one less than a perfect square. This article refers to the REM live recording For the mathematical term see Perfect square. Any other number which is n² - 1 for some integer n is not prime, since it is (n - 1)(n + 1). This is true for 3 as well, but in its case one of the factors is 1.

Three non-collinear points determine a plane and a circle. Circles are simple Shapes of Euclidean geometry consisting of those points in a plane which are at a constant Distance, called the

Three is the fourth Fibonacci number and the third that is unique. In Mathematics, the Fibonacci numbers are a Sequence of numbers named after Leonardo of Pisa, known as Fibonacci In the Perrin sequence, however, 3 is both the zeroth and third Perrin numbers. In Mathematics, the Perrin numbers are defined by the Recurrence relation P (0 = 3 P (1 = 0 P (2 = 2 In Mathematics, the Perrin numbers are defined by the Recurrence relation P (0 = 3 P (1 = 0 P (2 = 2

Three is the fourth open meandric number. In Mathematics, a meander or closed meander is a self-avoiding Closed curve which intersects a line a number of times

Vulgar fractions with 3 in the denominator have a single digit repeating sequences in their decimal expansions, (. In Mathematics, a fraction (from the Latin fractus, broken is a concept of a proportional relation between an object part and the object In Mathematics and Computer science, a digit is a symbol (a number symbol e The decimal ( base ten or occasionally denary) Numeral system has ten as its base. 000. . . , . 333. . . , . 666. . . )

A natural number is divisible by three if the sum of its digits in base 10 is divisible by 3. In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an In Mathematics, a divisor of an Integer n, also called a factor of n, is an integer which evenly divides n without For example, the number 21 is divisible by three (3 times 7) and the sum of its digits is 2 + 1 = 3. Because of this, the reverse of any number that is divisible by three (or indeed, any permutation of its digits) is also divisible by three. In several fields of Mathematics the term permutation is used with different but closely related meanings For instance, 1368 and its reverse 8631 are both divisible by three (and so are 1386, 3168, 3186, 3618, etc. . ). See also Divisibility rule. A divisibility rule is a method that can be used to determine whether a number is evenly divisible by other numbers

A triangle is the most durable shape possible, the only "perfect" figure which if all endpoints have hinges will never change its shape unless the sides themselves are bent. A triangle is one of the basic Shapes of Geometry: a Polygon with three corners or vertices and three sides or edges which are Line

3 is the only integer between e and π. The Mathematical constant e is the unique Real number such that the function e x has the same value as the slope of the tangent line IMPORTANT NOTICE Please note that Wikipedia is not a database to store the millions of digits of π please refrain from adding those to Wikipedia as it could cause technical problems

Three of the five regular polyhedra have triangular faces -- the tetrahedron, the octahedron, and the icosahedron. A regular polyhedron is a Polyhedron whose faces are congruent (all alike Regular polygons which are assembled in the same way around each Vertex A tetrahedron (plural tetrahedra) is a Polyhedron composed of four triangular faces three of which meet at each vertex. An octahedron (plural octahedra is a Polyhedron with eight faces In Geometry, an icosahedron ( Greek: eikosaedron, from eikosi twenty + hedron seat /ˌaɪ Also, three of the five regular polyhedra have vertices where three faces meet -- the tetrahedron, the hexahedron (cube), and the dodecahedron. A regular polyhedron is a Polyhedron whose faces are congruent (all alike Regular polygons which are assembled in the same way around each Vertex In Geometry, a vertex (plural "vertices" is a special kind of point. A tetrahedron (plural tetrahedra) is a Polyhedron composed of four triangular faces three of which meet at each vertex. A hexahedron (plural hexahedra is a Polyhedron with six faces A cube is a three-dimensional solid object bounded by six square faces facets or sides with three meeting at each vertex. A dodecahedron is any Polyhedron with twelve faces but usually a regular dodecahedron is meant a Platonic solid composed of twelve regular Pentagonal Furthermore, only three different types of polygons comprise the faces of the five regular polyhedra -- the triangle, the quadrilateral, and the pentagon. In Geometry a polygon (ˈpɒlɨɡɒn ˈpɒliɡɒn is traditionally a plane figure that is bounded by a closed path or circuit A regular polyhedron is a Polyhedron whose faces are congruent (all alike Regular polygons which are assembled in the same way around each Vertex A triangle is one of the basic Shapes of Geometry: a Polygon with three corners or vertices and three sides or edges which are Line In Geometry, a quadrilateral is a Polygon with four sides or edges and four vertices or corners. Regular pentagons The term pentagon is commonly used to mean a regular convex pentagon, where all sides are equal and all interior angles are equal (to

There are only three distinct 4×4 panmagic squares. A panmagic square, pandiagonal magic square, diabolic square, diabolical square or diabolical magic square is a Magic square with

Only three tetrahedral numbers are also perfect squares. A tetrahedral number, or triangular pyramidal number, is a Figurate number that represents a Pyramid with a triangular base and three sides called a

In numeral systems

It is frequently noted by historians of numbers that early counting systems often relied on the three-patterned concept of "One- Two- Many" to describe counting limits. In other words, in their own language equivalent way, early peoples had a word to describe the quantities of one and two, but any quantity beyond this point was simply denoted as "Many". As an extension to this insight, it can also be noted that early counting systems appear to have had limits at the numerals 2, 3, and 4. References to counting limits beyond these three indices do not appear to prevail as consistently in the historical record.

Base Numeral system
2 binary 11
3 ternary 10
over 3 (decimal, hexadecimal) 3

List of basic calculations

Multiplication 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 50 100 1000
3 \times x 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 150 300 3000
Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
3 \div x 3 1. In mathematical numeral systems, the base or radix is usually the number of unique digits, including zero that a positional Numeral A numeral system (or system of numeration) is a Mathematical notation for representing numbers of a given set by symbols in a consistent manner The binary numeral system, or base-2 number system, is a Numeral system that represents numeric values using two symbols usually 0 and 1. Ternary or trinary is the base - Numeral system. Analogous to a " Bit " a ternary digit is known as a trit ( The decimal ( base ten or occasionally denary) Numeral system has ten as its base. In Mathematics and Computer science, hexadecimal (also base -, hexa, or hex) is a Numeral system with a In mathematics Six is the second smallest Composite number, its proper Divisors being 1, 2 and 3. In mathematics Nine is a Composite number, its proper Divisors being 1 and 3. 18 ( eighteen) is the Natural number following 17 and preceding 19. 21 ( twenty-one) is the Natural number following 20 and preceding 22. 24 ( twenty-four) is the Natural number following 23 and preceding 25. 27 ( twenty-seven) is the Natural number following 26 and preceding 28. 30 ( thirty) is the Natural number following 29 and preceding 31. 33 ( thirty-three) is the Natural number following 32 and preceding 34. 36 ( thirty-six) is the Natural number following 35 and preceding 37. 39 ( thirty-nine) is the Natural number following 38 and preceding 40. 42 ( forty-two) is the Natural number following 41 and preceding 43. 45 ( forty-five) is the Natural number following 44 and followed by 46. 48 ( forty-eight) is the Natural number following 47 and preceding 49. 51 ( fifty-one) is the Natural number 51 following 50 and preceding 52. 54 ( fifty-four) is the Natural number following 53 and preceding 55. 57 ( fifty-seven) is the Natural number following 56 and preceding 58. 60 ( sixty) is the Natural number following 59 and preceding 61. 63 ( sixty-three) is a Natural number following 62 and preceding 64. 66 ( sixty-six) is the Natural number following 65 and preceding 67. 69 ( sixty-nine) is a number following 68 and preceding 70. In mathematics sixty-nine is the twentieth distinct Biprime 72 ( seventy-two) is the Natural number following 71 and preceding 73. 75 ( seventy-five) is the Natural number following 74 and preceding 76. This article is about the number 300 as well as the integers which follow it up to 399 3000 ( three thousand) is the Natural number following 2999 and preceding 3001 In Mathematics, especially in elementary Arithmetic, division is an arithmetic operation which is the inverse of Multiplication. Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity 5 1 0. This article discusses the number five. For the year 5 AD see 5. 75 0. 6 0. 5 0.\overline{4}2857\overline{1} 0. 375 0.\overline{3} 0. This article is about the number 300 as well as the integers which follow it up to 399 3 0.\overline{2}\overline{7} 0. 25 0.\overline{2}3076\overline{9} 0.2\overline{1}4285\overline{7} 0. 25 ( twenty-five) is the Natural number following 24 and preceding 26. 2
x \div 3 0.\overline{3} 0.\overline{6} 1 1.\overline{3} 1.\overline{6} 2 2.\overline{3} 2.\overline{6} 3 3.\overline{3} 3.\overline{6} 4 4.\overline{3} 4.\overline{6} 5
Exponentiation 1 2 3 4 5 6 7 8 9 10 11 12 13
3 ^ x\, 3 9 27 81 243 729 2187 6561 19683 59049 177147 531441 1594323
x ^ 3\, 1 8 27 64 125 216 343 512 729 1000 1331 1728 2197

Evolution of the glyph

Image:Evolution3glyph.png

Three is often the largest number written with as many lines as the number represents. 81 ( eighty-one) is the Natural number following 80 and preceding 82. 243 ( two hundred forty-three) is the Natural number following 242 and preceding 244. In mathematics 8 is a Composite number, its Proper divisors being 1, 2, and 4. 27 ( twenty-seven) is the Natural number following 26 and preceding 28. 64 ( sixty-four) is the Natural number following 63 and preceding 65. 216 is the Natural number following 215 and preceding 217 In other fields The number of digits in the sequence (Naturalis Veritas the end of the This article is about the number 300 as well as the integers which follow it up to 399 500 ( five hundred) is the Natural number following 499 and preceding 501. The Romans tired of writing 4 as IIII, but to this day 3 is written as three lines in Roman and Chinese numerals. Ancient Rome was a Civilization that grew out of a small agricultural community founded on the Italian Peninsula as early as the 10th century BC Chinese numerals are characters for writing Numbers in Chinese. This was the way the Brahmin Indians wrote it, and the Gupta made the three lines more curved. Brahmin ( Brāhmaṇa, sa ब्राह्मणः is the class of educators scholars and preachers in Brahminical Hinduism. The Gupta Empire ( Hindi: गुप्त राजवंश was ruled by members of the Gupta dynasty from around 320 to 550 C The Nagari started rotating the lines clockwise and ending each line with a slight downward stroke on the right. Eventually they made these strokes connect with the lines below, and evolved it to a character that looks very much like a modern 3 with an extra stroke at the bottom. It was the Western Ghubar Arabs who finally eliminated the extra stroke and created our modern 3. The araB gene Promoter is a bacterial promoter activated by e L-arabinose binding (The "extra" stroke, however, was very important to the Eastern Arabs, and they made it much larger, while rotating the strokes above to lie along a horizontal axis, and to this day Eastern Arabs write a 3 that looks like a mirrored 7 with ridges on its top line): ٣[1]

While the shape of the 3 character has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in Image:TextFigs036.png. Typography, an ascender is the portion of a letter in a Latin-derived alphabet that extends above the Mean line of a font. In Typography, a typeface is a set of one or more Fonts designed with stylistic unity each comprising a coordinated set of Glyphs A typeface usually comprises Text figures (also known as non-lining, lowercase, old-style, ranging or hanging figures or numerals are numerals Typography, a descender is the portion of a letter in a Latin alphabet that extends below the baseline of a font. In some French text-figure typefaces, though, it has an ascender instead of a descender. French ( français,) is a Romance language spoken around the world by 118 million people as a native language and by about 180 to 260 million people

A common variant of the digit 3 has a flat top, similar to the character Ʒ (ezh), sometimes used to prevent people from falsifying a 3 into an 8. Ezh ( Ʒ ʒ) is a letter in the International Phonetic Alphabet (IPA representing the Voiced postalveolar fricative consonant

In science

3-patterned general formula of the Scientific Method''
1. The observation of the phenomena and the recording of facts.
2. The formulation of physical laws from the generalization of the phenomena.
3. The development of a theory that is used to predict new phenomena.


Anatomy

Anthropology

3 distinct species of the genus Homo:

  1. Homo habilis "capable man"
  2. Homo erectus "upright man"
  3. Homo sapiens "wise man"

3 distinct species of the genus Paranthropus:

  1. Paranthropus robustus
  2. Paranthropus boisei
  3. Paranthropus aethiopicus

3 Proconsul species:

  1. Proconsul africanus
  2. Proconsul major
  3. Proconsul nyanzae

3 Pan troglodyte sub-species:

  1. Pan Troglodytes Schweinfurthii- (Eastern Common Chimpanzee)
  2. Pan Troglodytes Troglodytes- (Central Common Chimp)
  3. Pan Troglodytes Verus- (Western Common Chimp)

3 types of primates:

  1. Prosimians
  2. Monkeys (old & new world)
  3. Apes (lesser & greater apes, as well as humans)

3 social group types of the Great Apes:

  1. Orangutans (Solitary - little amount of both sexes)
  2. Gorillas (Harems - great amount of one sex)
  3. Common Chimps (Live in territories defended by related males - great amount of both sexes)

Three traditional families of hominoid:

  1. Hylobatidae- include the so-called lesser apes of Asia, the gibbons and siamangs.
  2. Hominidae- include living humans and typically fossil apes that possess a suite of characteristics such as bipedalism, reduced canine size, and increasing brain size such as the australopithecines.
  3. Pongidae- include the remaining African great apes including gorillas, chimpanzees, and the Asian orangutan.

Present day humans have been referred to as the 3rd chimpanzee.

Astronomy

  1. ellipticals,
  2. spirals and
  3. irregulars. A galaxy is a massive gravitationally bound system consisting of Stars an Interstellar medium of gas and dust, and Dark matter

Biology (specific and general)

else can survive: Methanogens~ Halophiles~ Thermoacidophiles.

Chemistry

Computer Science

  1. A robot may not injure a human being or, through inaction, allow a human being to come to harm. Isaac Asimov (c January 2 1920 &ndash April 6 1992 ˈaɪzək ˈæzɪmʌv originally Исаак Озимов but now transcribed into Russian as, was a Russian In Science fiction, the Three Laws of Robotics are a set of three rules written by Isaac Asimov, which almost all positronic robots appearing in his fiction
  2. A robot must obey orders given to it by human beings, except where such orders would conflict with the First Law.
  3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.

Geology

History

Physics

Physiology


Plants and Animals


Psychology

In religion and mythology

Main article: triple deities
Further information: trifunctional hypothesis and triad (symbol)

In Buddhism

Abrahamic religions

The Shield of the Trinity is a diagram of the Christian doctrine of the Trinity
The Shield of the Trinity is a diagram of the Christian doctrine of the Trinity

Other religions

In esoteric tradition

In fictional religion

In philosophy

3-patterned Philosophical Distinctions
St. Augustine's Philosophy: Memory~ Understanding~ Will
Aquinas's 3 transcendentals of being: Unity~ Truth~ Goodness
Aquinas's 3 requisites for the beautiful: Wholeness or perfection~ Harmony or due proportion~ Radiance
Aquinas's 3 logical faculties (based in Aristotle) Conception~ Judgment~ Reasoning
Aquinas's 3 causal principles (based in Aristotle) Agent~ Patient~ Act
Comte's Philosophy: Great Being~ Great Medium~ Great Fetish
Hegel's 3 Spirits: Subjective Spirit~ Objective Spirit~ Absolute Spirit
Plotinu's Philosophy: One~ One Many~ One and Many
Aristotle's 3 Unities: Unity of Action~ Unity of Time~ Unity of Place
Sir F. Bacon's 3 Tables: Presence~ Absence~ Degree
Thomas Hobbes's 3 Fields: Physics~ Moral Philosophy~ Civil Philosophy
Immanuel Kant's 3 Critiques: Pure Reason~ Practical Reason~ Judgment
Averroes's 3 Commentaries: Little~ Middle~ Great
Karl Marx's 3 isms: Communism~ Socialism~ Capitalism
Woodrow Wilson's 3 isms: Colonialism~ Racism~ Anti-Communism
Hippocrates's Mind Disorders: Mania~ Melancholia~ Phrenitis
Emile Durkeim's 3 Suicides: Egoistic~ Altruistic~ Anomic
D. Liesman's 3 Social Characters: Tradition-directed~ Inner-directed~ Other-directed
Erich Fromm's 3 Symbols: The Conventional~ The Accidental~ The Universal
Pythagoras's "fusion" idea: Monarchy~ Oligarchy~ Democracy (into harmonic whole)
M. L. King Jr. 's "Middle Road": Acquiescence~ Nonviolence~ Violence
Kierkegaard's 3 Stages: Aesthetic~ Ethical~ Religious
Husserl's 3 Reductions: Phenomenological~ Eidetic~ Religious
St. Augustine's 3 Laws: Divine Law~ Natural Law~ Temporal, or positive Law
Witness Stand truths: The Truth~ The whole Truth~ Nothing but the Truth
Titus Carus's 3 Ages: Stone Age~ Bronze Age~ Iron Age
Feuerbach's 3 Thoughts: God, 1st Thought~ Reason, 2nd~ Man, 3rd
Magnus's 3 Universals: Ante Rem~ In Rem~ Post Rem
Max Weber's 3 Authorities: Traditional~ Charismatic~ Legal-rational
F.   de Sausure's 3 "Signs": Sign~ Signified~ Signifier
Charles Peirce's 3 semiotic elements Sign~ Object~ Interpretant
Charles Pierce's 3 categories: Quality of feeling~ Reaction/resistance~ Representation
Charles Peirce's 3 universes of experience: Ideas~ Brute fact~ Habit (habit-taking)
Charles Peirce's 3 normatives: The good (esthetic)~ The right (ethical)~ The true (logical)
Charles Peirce's 3 grades of conceptual clearness By familiarity~ Of definition's parts~ Of conceivable practical consequences
Charles Peirce's 3 modes of evolution: Fortuitous variation~ Mechanical necessity~ Creative love
John Keynes's 3 Eras: Scarcity~ Abundance~ Stabilization
George Mead's 3 Distinctions: Self~ I~ Me
Thrasher's 3-group Gangs: Inner Circle~ Rank & File~ Fringers
Abe Lincoln's 3-For-All: Of the People~ By the People~ For the People
Jesus Christ's 3 Praises: In the name of the Father~ Son~ Holy Spirit
Samuel Clemmons' (Mark Twain) 3 lies: Lies~ Damned Lies~ Statistics
J. W. S. Pringle's 3 intellectual problems: Religious & Ethical~ Practical~ Scientific
J. Bruner's 3 cognitive processing modes: Enactive~ Iconic~ Symbolic
Wilhelm Wundt's 3 mind elements: Sensations~ Images~ Feelings
Robert Sternberg's 3 love components: Passion~ Intimacy~ Commitment
Sternberg's Triarchic Intelligence: Analytic~ Creative~ Practica
Paul D. Maclean's Triune Brain: R-System (Reptilian)~ Limbic System~ Neocortex
3-monkey Philosophy: Hear no Evil~ See no Evil~ Speak no Evil
J. A. Fodor's mind Taxonomy: Central Processes~ Input Processes~ Transducers
Plato's Tripartite soul: Rational~ Libidinous~ Spirited (various animal qualities)
Hjalmar Wennerberg's philosophy orders: Phenomenology~ Normative Science~ Metaphysics
W. H. Sheldon's body types: Endomorph~ Mesomorph~ Ectomorph
Ernst Kretschmer's body types: Pyknic~ Asthenic~ Athletic
Aristotle's 3 in 1 idea: Mind~ Self-knowledge~ Self-love
K. J. W. Craik's 3 reasoning processes: Translation~ Reasoning~ Retranslation
Galton's 3 genius traits: Intellect~ Zeal~ Power of working
Gregor Mendel "laws": Independent Unit Characters~ Segregation~ Dominance
Darwinian essentials of Evolution: Variation~ Heredity~ Struggle for existence

In Education

In politics

Christ sorting people into prayers, protectors and workers.
Christ sorting people into prayers, protectors and workers.

As a lucky or unlucky number

Three (三, formal writing: 叁, pinyin san1, Cantonese: saam1) is considered a good number in Chinese culture because it sounds like the word "alive" (生 pinyin sheng1, Cantonese: saang1), compared to four (四, pinyin: si4, Cantonese: sei3) that sounds like the word "death" (死 pinyin si3, Cantonese: sei2). Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use Numerology is any of many Systems Traditions or Beliefs in a mystical or Esoteric relationship between Numbers and physical The Culture of China (traditional Chinese 中國文化 simplified Chinese 中国文化 is home to one of the world's oldest and most complex Civilizations covering a history Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use In mathematics Four is the smallest Composite number, its proper Divisors being and. Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use Pinyin, more formally Hanyu pinyin, is the most common Standard Mandarin Romanization system in use

Counting to three is common in situations where a group of people wish to perform an action in synchrony: Now, on the count of three, everybody pull!  Assuming the counter is proceeding at a uniform rate, the first two counts are necessary to establish the rate, but then everyone can predict when "three" will come based on "one" and "two"; this is likely why three is used instead of some other number.

In Vietnam, it is bad luck to take a photo with three people in it.

Luck, especially bad luck, is often said to "come in threes". Luck (also called fortunity) is a chance happening, or that which happens beyond a person's control.

Some cultures in history have a place for people of third gender such as in Thailand. The terms third gender and third sex describe individuals who are considered to be neither women nor men as well as the social category present in those societies who recognize

It is often believed that people die in threes. This only includes people in your personal sphere (ie. directly impact on your day-to-day life).

There is a superstition that states it is unlucky to take a third light, that is, to be the third person to light a cigarette from the same match or lighter. This is commonly believed to date from the trenches of the First World War when a sniper might see the first light, take aim on the second and fire on the third.

3 strikes and you're out.

3rd time's a charm.

In technology

3 as a resin identification code, used in recycling.

In music

In Geography

Flag of Trinacria with a three-legged symbol.
Flag of Trinacria with a three-legged symbol. A triskelion or triskele (both from the Greek gr ''τρισκέλιον'' or grc ''τρισκελής'' for "three-legged" is a Symbol

In filmography

In sports

In literature

Original scholarly articles/reviews about the three

In other fields

International maritime signal flag for 3 is known as a triband, a form of the tricolour.
International maritime signal flag for 3 is known as a triband, a form of the tricolour. The triband is one of the most common designs of Flag, and is the design of some 30% of all current national flags A tricolour or tricolor (three colours is a Flag or Banner more-or-less equally divided (horizontally vertically or less frequently diagonally
Travelling in a troika (three-horse sled).
Travelling in a troika (three-horse sled).
For other uses of "3 (number)", see 3 (number) (disambiguation).

Three is:

References

  1. ^ Georges Ifrah, The Universal History of Numbers: From Prehistory to the Invention of the Computer transl. David Bellos et al. London: The Harvill Press (1998): 393, Fig. 24. 63

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