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7

0 1 2 3 4 5 6 7 8 9

0 10 20 30 40 50 60 70 80 90

Cardinal 7
seven
Ordinal 7th
seventh
Numeral system septenary
Factorization prime
Divisors 1, 7
Roman numeral VII
Roman numeral (Unicode) Ⅶ, ⅶ
Amharic
Indian ٧
Bengali
Chinese numeral 七,柒
Devanāgarī
Hebrew ז (Zayin)
Khmer
Thai
prefixes hepta-/hept- (from Greek)

septua- (from Latin)

Binary 111
Octal 7
Duodecimal 7
Hexadecimal 7
Seven Days of Creation - 1765 book, title page
Seven Days of Creation - 1765 book, title page

7 (seven) is the natural number following 6 and preceding 8. 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 Three is the first odd Prime number, and the second smallest prime 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 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 The septenary Numeral system is the base - number system and uses the digits 0-6 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. Amharic (አማርኛ amarəñña) is a Semitic language spoken in North Central Ethiopia by the Amhara. Chinese numerals are characters for writing Numbers in Chinese. Khmer numerals are the numerals used in the Khmer language of Cambodia. Thai numerals (เลขไทย are a set of numerals traditionally used in Thailand, although the Arabic numerals are more common 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 In Mathematics, a natural number (also called counting number) can mean either an element of the set (the positive Integers or an In mathematics Six is the second smallest Composite number, its proper Divisors being 1, 2 and 3. In mathematics 8 is a Composite number, its Proper divisors being 1, 2, and 4.

Contents

In mathematics

In numeral systems

Base Numeral system
2 binary 111
3 ternary 21
4 quaternary 13
5 quinary 12
6 senary 11
7 septenary 10
over 7 (octal, decimal, etc) 7

In quaternary, 7 is the smallest prime with a composite sum of digits. 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 ( Quaternary is the base - Numeral system. It uses the digits 0 1 2 and 3 to represent any Real number. Quinary ( base -) is a Numeral system with five as the base This originates from the five Fingers on either Hand. In Mathematics, a senary Numeral system is a base - numeral system The septenary Numeral system is the base - number system and uses the digits 0-6 The octal Numeral system, or oct for short is the base -8 number system and uses the digits 0 to 7 The decimal ( base ten or occasionally denary) Numeral system has ten as its base.

In the English language, 7 is the only 2-syllable natural, positive 1-digit number

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
7 \times x 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 112 119 126 133 140 147 154 161 168 175 350 700 7000
Division 1 2 3 4 5 6 7 8 9 10
11 12 13 14 15
7 \div x 7 3. 21 ( twenty-one) is the Natural number following 20 and preceding 22. 28 ( twenty-eight) is the Natural number following 27 and preceding 29. 35 ( thirty-five) is the Natural number following 34 and preceding 36. 42 ( forty-two) is the Natural number following 41 and preceding 43. This page is for the number For the steamboat see Forty-Nine (steamboat 49 ( forty-nine) is the Natural number following 48 56 ( fifty-six) is the Natural number following 55 and preceding 57. 63 ( sixty-three) is a Natural number following 62 and preceding 64. 70 ( seventy) is the Natural number following 69 and preceding 71. 77 ( seventy-seven) is the Natural number following 76 and preceding 78. 84 ( eighty-four) is the Natural number following 83 and preceding 85. 91 ( ninety-one) is the Natural number following 90 and preceding 92. 98 ( ninety-eight) is the Natural number following 97 and preceding 99. 175 is the Natural number following 174 and preceding 176. It is a Decagonal number. This article is about the number 300 as well as the integers which follow it up to 399 This article is about the numbers 700 through 799 for each individual number see its section below 7000 ( seven thousand) is the Natural number following 6999 and preceding 7001 In Mathematics, especially in elementary Arithmetic, division is an arithmetic operation which is the inverse of Multiplication. ---- In mathematics Three is the first odd Prime number, and the second smallest prime 5 2.\overline{3} 1. This article discusses the number five. For the year 5 AD see 5. Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity 75 1. 75 ( seventy-five) is the Natural number following 74 and preceding 76. 4 1.1\overline{6} 1 0. In mathematics Four is the smallest Composite number, its proper Divisors being and. 875 0.\overline{7} 0. 7
0.\overline{63} 0.58\overline{3} 0.\overline{538461} 0. 5 0.4\overline{6}
x \div 7 0.\overline{142857} 0.\overline{285714} 0.\overline{428571} 0.\overline{571428} 0.\overline{714285} 0.\overline{857142} 1 1.\overline{142857} 1.\overline{285714} 1.\overline{428571}
1.\overline{571428} 1.\overline{714285} 1.\overline{857142} 2 2.\overline{142857}
Exponentiation 1 2 3 4 5 6 7 8 9 10 11 12 13
7 ^ x\, 7 49 343 2401 16807 117649 823543 5764801 40353607 282475249 1977326743 13841287201 96889010407
x ^ 7\, 1 128 2187 16384 78125 279936 823543 2097152 4782969 10000000 19487171 35831808 62748517
Radix 1 5 10 15 20 25 30 40 50 60 70 80 90 100
110 120 130 140 150 200 250 500 1000 10000 100000 1000000
x_{7} \ 1 5 13_{7} \ 21_{7} \ 26_{7} \ 34_{7} \ 42_{7} \ 55_{7} \ 101_{7} \ 114_{7} \ 130_{7} \ 143_{7} \ 156_{7} \ 202_{7} \
215_{7} \ 231_{7} \ 244_{7} \ 260_{7} \ 303_{7} \ 404_{7} \ 505_{7} \ 1313_{7} \ 2626_{7} \ 41104_{7} \ 564355_{7} \ 11333311_{7} \

Evolution of the glyph

Image:SevenGlyph.svg

In the beginning, various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J upside down. In mathematics Two has many properties in Mathematics. An Integer is called Even if it is divisible by 2 This article is about the number 300 as well as the integers which follow it up to 399 In mathematical numeral systems, the base or radix is usually the number of unique digits, including zero that a positional Numeral A Hindu ( Devanagari: हिन्दू is an adherent of the philosophies and scriptures of Hinduism, a set of religious, Philosophical Capital letters or majuscules pronunciation /məˈdʒʌskyuls ˈmædʒəˌskyuls/ in the Roman alphabet A, B, C, D, J is the tenth letter in the modern Latin alphabet; it was the last of the 26 letters to be added The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character more rectilinear. In Typography, a grapheme is the fundamental unit in written language. The eastern Arabs developed the character from a 6-look-alike into an uppercase V-look-alike. The araB gene Promoter is a bacterial promoter activated by e L-arabinose binding Both modern Arab forms influenced the European form, a two-stroke character consisting of a horizontal upper line joined at its right to a line going down to the bottom left corner, a line that is slightly curved in some font variants. As is the case with the European glyph, the Cham and Khmer glyph for 7 also evolved to look like their glyph for 1, though in a different way, so they were also concerned with making their 7 more different. For the Khmer this often involved adding a horizontal line above the glyph. [1] This is analogous to the horizontal stroke through the middle that is sometimes used in handwriting in the Western world but which is almost never used in computer fonts. This horizontal stroke is, however, important to distinguish the glyph for seven from the glyph for one in writings that use a long upstroke in the glyph for one. Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity Mathematics For any number x: x ·1 = 1· x = x (1 is the multiplicative identity

On the seven-segment displays of pocket calculators and digital watches, 7 is the number with the most common glyph variation (0, 6 and 9 also have variant glyphs). A seven-segment display (abbreviation " 7-seg (ment display" less commonly known as a seven-segment indicator, is a form of electronic Display device Most calculators use three line segments, but on Sharp, Casio, and a few other brands of calculators, 7 is written with four line segments. () is a Japanese Electronics manufacturer founded in 1912 It takes its name from one of its founder's first inventions the Ever-Sharp Mechanical pencil, which ( is a Japanese electronic devices manufacturing company founded in 1946 with its Headquarters in Tokyo. The reason is that in Japan & Korea 7 is written as ① in the illustration to the right.

While the shape of the 7 character has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in Image:TextFigs078.svg. 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.

Some people, especially in Europe and Latin America, write 7 with a line in the middle and make the top line crooked. The line through the middle is useful to clearly differentiate the character from the number one, as these can appear similar when written in certain styles of handwriting.

In science

Physics

3. generation τ- anti-t b-quark anti-b t-quark τ+
2. generation μ- anti-c s-quark anti-s c-quark μ+
1. generation e- anti-u d-quark anti-d u-quark e+
0. generation stem particle
charge -3/3 -2/3 -1/3 0 +1/3 +2/3 +3/3
angular spin -3 -2 -1 0 +1 +2 +3

It is obvious that a symmetry exists with no electromagnetic charge. Electromagnetism is the Physics of the Electromagnetic field: a field which exerts a Force on particles that possess the property of It is assumed here, that the size of charge is linearly dependent on the number of quanta of angular spin generating it. In the state of symmetry no magnetic component is generated because no angular spin exists. A particle in such a supersymmetric state would be dark because it cannot electromagnetically interact. Breaking of supersymmetry of this topologically substructured superstring particle would be a change of its angular spin, generating corresponding particles of physics in dependence of the energy level. This angular spin not only generates charge but highly non-linearly also gravo-magnetic mass in dependence of string tension (energy). There seems to be only one generic unique geometry with a fixed functionality of a weak interacting superstring dark stem particle. (0. generation).

In generations one to three there are two sets of three physical particles with opposite charge according to the direction of angular spin. For all three generations only two geometrically and functionally identical dark stem particles exist. These only differ by their handedness, generating matter and antimatter particles on breaking of 0-spin symmetry.

Chemistry

Astronomy

In technology

7 as a resin identification code, used in recycling.
7 represented in a seven-segment display.

In the classical world

In classical antiquity:

In religion

God rested on and sanctified the seventh day (Sabbath).
God rested on and sanctified the seventh day (Sabbath). Classical antiquity (also the classical era or classical period) is a broad term for a long period of cultural History centered on the Mediterranean The Seven against Thebes (Επτά επί Θήβας Epta epi Thēbas) is a mythic narrative whose classic statement is found in the play by Aeschylus (467 BCE The Seven Hills of Rome east of the river Tiber form the geographical heart of Rome, within the walls of the ancient city The term liberal arts refers to a particular type of educational Curriculum broadly defined as a Classical education. The Seven Wonders of the World (or the Seven Wonders of the Ancient World) is a well known list of seven remarkable constructions of Classical antiquity. Rome ( Roma ˈroma Roma is the capital city of Italy and Lazio, and is Italy's largest and most populous city with more than 2 Augustus ( Latin: IMPERATOR·CAESAR·DIVI·FILIVS·AVGVSTVS September 23 63 BC – August 19 AD 14) born Gaius Octavius Thurinus, was Servius Sulpicius Galba ( December 24, 3 BC &ndash January 15, 69) also called Servius Sulpicius Galba Caesar Publius Aelius Hadrianus (January 24 76 &ndash July 10 138 as emperor Imperator Caesar Divi Traiani filius Traianus Hadrianus Augustus, and Divus Hadrianus after Marcus Cocceius Nerva was also the name of a Roman emperor NERVA is an acronym for Nuclear Engine for Rocket For the philosopher see Sallustius; for other uses see Sallust (disambiguation. Titus Flavius Vespasianus, commonly known as Vespasian ( November 17 9 &ndash June 23 79) was a Roman Emperor who

In mythology

In psychology

In music

In television

In film

In literature

In video games

In sports

In other fields

7 playing cards of all four suits
7 playing cards of all four suits

Seven is also:

Names and titles

Notes

  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): 395, Fig. 24. 67
  2. ^ "21Then Peter came to Jesus and asked, 'Lord, how many times shall I forgive my brother when he sins against me? Up to seven times?' 22Jesus answered, 'I tell you, not seven times, but seventy times seven. '". [1] The value of 490 suggested by Jesus has been the source of much debate among scholars. Events By Place Europe April 1 — The majority of Odoacer 's army including his Magister militum Tufa surrenders For example, did he actually mean to impose a limit at 490, or did he only mean that the number of times (one should be forgiven) is to be ongoing? Most conclude the latter. Events By Place Europe April 1 — The majority of Odoacer 's army including his Magister militum Tufa surrenders Alternatively, it may be that the New Testament's mention of seventy "times" seven is a mistranslation of the original Hebrew based on the statement of Lemech (Genesis 4:24) that "If Cain shall be avenged sevenfold, then for Lemech it shall be seventy-sevenfold. Lamech (ˈleɪmɛk (לֶמֶך-Lemech is the name of two men in the genealogies of Adam in the book of Genesis. "
  3. ^ http://www.bible.org/illus.php?topic_id=1510
  4. ^ "Showdowns of Summer," Entertainment Weekly, September 7, 2007

See also

References

External links

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