Affluent Savvy
Photo by Leah Kelley Pexels Logo Photo: Leah Kelley

Why is number 10 special?

Ten is the base of the decimal numeral system, by far the most common system of denoting numbers in both spoken and written language. It is the first double-digit number. The reason for the choice of ten is assumed to be that humans have ten fingers (digits).

en.wikipedia.org - 10 - Wikipedia
Who bought the first African slaves to America?
Who bought the first African slaves to America?

the Portuguese First enslaved Africans arrive in Jamestown, setting the stage for slavery in North America. On August 20, 1619, “20 and odd”...

Read More »
Last updated Jun 19, 2021
What can I buy that will generate income?
What can I buy that will generate income?

Investing for income: 7 money-generating assets for your portfolio and how to get started Dividend stocks. ... Bonds. ... Real estate. ... Money...

Read More »
Last updated Nov 8, 2020

This article is about the number. For the year, see AD 10 . For other uses, see Ten (disambiguation)

"10th" redirects here. For other uses, see Tenth (disambiguation)

Natural number

10 (ten) is the even natural number following 9 and preceding 11. Ten is the base of the decimal numeral system, by far the most common system of denoting numbers in both spoken and written language. It is the first double-digit number. The reason for the choice of ten is assumed to be that humans have ten fingers (digits).

Anthropology [ edit ]

Usage and terms [ edit ]

A collection of ten items (most often ten years) is called a decade.

The ordinal adjective is decimal ; the distributive adjective is denary .

; the distributive adjective is . Increasing a quantity by one order of magnitude is most widely understood to mean multiplying the quantity by ten. To reduce something by one tenth is to decimate. (In ancient Rome, the killing of one in ten soldiers in a cohort was the punishment for cowardice or mutiny; or, one-tenth of the able-bodied men in a village as a form of retribution, thus causing a labor shortage and threat of starvation in agrarian societies.)

Other [ edit ]

In mathematics [ edit ]

Ten is the fifth composite number. Ten is the smallest noncototient, a number that cannot be expressed as the difference between any integer and the total number of coprimes below it.[1] It is the second discrete semiprime ( 2 × 5 {\displaystyle 2\times 5} ) and the second member of the ( 2 × q {\displaystyle 2\times q} ) discrete semiprime family. Ten has an aliquot sum σ(10) of 8 and is accordingly the first discrete semiprime to be in deficit, with all subsequent discrete semiprimes in deficit.[2] Ten is the smallest number that can be written as the sum of two prime numbers in two different ways ( 3 + 7 = 5 + 5 = 10 {\displaystyle 3+7=5+5=10} ), and the only number whose sum and difference of its prime divisors yield prime numbers ( 2 + 5 = 7 {\displaystyle 2+5=7} and 5 − 2 = 3 {\displaystyle 5-2=3} ). It is also the smallest semiprime that is the sum of all the distinct prime numbers from its lower factor through its higher factor ( 10 = 2 + 3 + 5 = 2 × 5 {\displaystyle 10=2+3+5=2\times 5} ).[3] In general, powers of 10 contain n 2 {\displaystyle n^{2}} divisors, where n {\displaystyle n} is the number of digits: 10 has 22 = 4 divisors, 100 has 32 = 9 divisors, 1,000 has 42 = 16 divisors, 10,000 has 52 = 25 divisors, and so forth. Ten is the eighth Perrin number, preceded in the sequence by (5, 5, 7).[4] According to conjecture, ten is the average sum of the proper divisors of the natural numbers N {\displaystyle \mathbb {N} } if the size of the numbers approaches infinity.[5]

As important sums,

10 = 2 + 3 + 5 {\displaystyle 10=2+3+5} prime numbers.

prime numbers. 10 = 1 + 2 + 3 + 4 {\displaystyle 10=1+2+3+4} 10 = 0 ! + 1 ! + 2 ! + 3 ! {\displaystyle 10=0!+1!+2!+3!} factorials.

factorials. 10 = 1 2 + 3 2 {\displaystyle 10=1^{2}+3^{2}} odd numbers.

The factorial of ten is equal to the product of the factorials of the first three odd primes, 10 ! = 3 ! ⋅ 5 ! ⋅ 7 ! {\displaystyle 10!=3!\cdot 5!\cdot 7!} .[6] Ten is also the first number whose fourth power can be written as a sum of two squares in two different ways ( 80 2 + 60 2 {\displaystyle 80^{2}+60^{2}} and 96 2 + 28 2 {\displaystyle 96^{2}+28^{2}} ). In the sequence of triangular numbers, indexed powers of 10 in this sequence generate the following sequence of triangular numbers: 55 (10th), 5,050 (100th), 500,500 (1,000th), ...[7][a] While 55 is the tenth triangular number, it is also the tenth Fibonacci number, and the largest such number to also be a triangular number.[8] Ten is the first non-trivial decagonal number, the third centered triangular number and tetrahedral number, and the fifth semi-meandric number.[9][10][11][12] A 10 × 10 {\displaystyle 10\times 10} magic square has a magic constant of 505.[13] The aliquot sequence for 10 comprises five members (10, 8, 7, 1, 0) with this number being the second composite member of the 7-aliquot tree.[14] It is also the number of n {\displaystyle n} -queens problem solutions for n = 5 {\displaystyle n=5} .[15]

What is considered rich by age?
What is considered rich by age?

Here's the net worth each generation says you need to be considered wealthy in 2021: Millennials (ages 24 to 39): $1.4 million. Gen X (ages 40 to...

Read More »
Last updated Sep 5, 2022
How do you get rid of rats overnight?
How do you get rid of rats overnight?

Set Traps Traps are one of the most effective ways to get rid of rats fast. For best results, consider using snap traps, which are a fast method to...

Read More »
Last updated Sep 18, 2020
Awaken your dormant DNA ability to attract wealth effortlessly
Awaken your dormant DNA ability to attract wealth effortlessly

The simple yet scientifically proven Wealth DNA method laid out in the report allows you to effortlessly start attracting the wealth and abundance you deserve.

Learn More »
Promotion

Ten is the smallest number whose status as a possible friendly number is unknown.[16] There are ten small Pisot numbers that do not exceed the golden ratio.[17]

In geometry [ edit ]

A polygon with ten sides is called a decagon. As a constructible polygon with a compass and straight-edge, it has an internal angle of 12 2 = 144 {\displaystyle 12^{2}=144} degrees and a central angle of 6 2 = 36 {\displaystyle 6^{2}=36} degrees. All regular n {\displaystyle n} -sided polygons with up to ten sides are able to tile a plane-vertex alongside other regular polygons alone; the first regular polygon unable to do so is the eleven-sided hendecagon.[18] A decagon can fill a plane-vertex alongside two regular pentagons, and alongside a fifteen-sided pentadecagon and triangle. Ten of the eleven regular and semiregular (or Archimedean) tilings of the plane are Wythoffian, the elongated triangular tiling is the only exception.[19] The regular decagon is the Petrie polygon of the regular dodecahedron and icosahedron, and it is the largest face that an Archimedean solid can contain, as with the truncated dodecahedron and the truncated icosidodecahedron. The decagon is the hemi-face of the icosidodecahedron, such that a plane dissection yields two mirrored pentagonal rotundae. A regular ten-pointed {10/3} decagram is the hemi-face of the great icosidodecahedron, as well as the Petrie polygon of two regular Kepler-Poinsot polyhedra. Ten non-prismatic uniform polyhedra contain regular decagons as faces (U 26 , U 28 , U 33 , U 37 , U 39 , ...), and ten contain regular decagrams as faces (U 42 , U 45 , U 58 , U 59 , U 63 ...). The decagonal prism is also the largest prism that is a facet inside four-dimensional uniform polychora. There are ten regular star polychora in the fourth dimension.[20] All of these polychora have orthographic projections in the H 3 {\displaystyle \mathrm {H} _{3}} Coxeter plane that contain various decagrammic symmetries, which include the regular {10/3} form as well as its three alternate compound forms. M 10 {\displaystyle \mathrm {M} _{10}} is a multiply transitive permutation group on 10 points. It is an almost simple group, of order 720 = 24·32·5 = 2·3·4·5·6 = 8·9·10. It functions as a point stabilizer of degree 11 inside the smallest sporadic group M 11 {\displaystyle \mathrm {M} _{11}} , a Mathieu group which has an irreducible faithful complex representation in 10 dimensions. E 10 {\displaystyle \mathrm {E} _{10}} is an infinite-dimensional Kac–Moody algebra which has the even Lorentzian unimodular lattice II 9,1 of dimension 10 as its root lattice. It is the first E n {\displaystyle \mathrm {E} _{n}} Lie algebra with a negative Cartan matrix determinant, of −1. There are precisely ten affine Coxeter groups that admit a formal description of reflections across n {\displaystyle n} dimensions in Euclidean space. These contain infinite facets whose quotient group of their normal abelian subgroups is finite. They include the one-dimensional Coxeter group I ~ 1 {\displaystyle {\tilde {I}}_{1}} [∞], which represents the apeirogonal tiling, as well as the five affine Coxeter groups G ~ 2 {\displaystyle {\tilde {G}}_{2}} , F ~ 4 {\displaystyle {\tilde {F}}_{4}} , E ~ 6 {\displaystyle {\tilde {E}}_{6}} , E ~ 7 {\displaystyle {\tilde {E}}_{7}} , and E ~ 8 {\displaystyle {\tilde {E}}_{8}} that are associated with the five exceptional Lie algebras. They also include the four general affine Coxeter groups A ~ n {\displaystyle {\tilde {A}}_{n}} , B ~ n {\displaystyle {\tilde {B}}_{n}} , C ~ n {\displaystyle {\tilde {C}}_{n}} , and D ~ n {\displaystyle {\tilde {D}}_{n}} that are associated with simplex, cubic and demihypercubic honeycombs, or tessellations. Regarding Coxeter groups in hyperbolic space, there are infinitely many such groups; however, ten is the highest rank for paracompact hyperbolic solutions, with a representation in nine dimensions. There also exist hyperbolic Lorentzian cocompact groups where removing any permutation of two nodes in its Coxeter-Dynkin diagram leaves a finite or Euclidean graph. The tenth dimension is the highest dimensional representation for such solutions, which share a root symmetry in eleven dimensions. These are of particular interest in M-theory of string theory.

List of basic calculations [ edit ]

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 26 50 100 1000 10 × x 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 500 1000 10000 Division 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 10 ÷ x 10 5 3. 3 2.5 2 1. 6 1. 428571 1.25 1. 1 1 0. 90 0.8 3 0. 769230 0. 714285 0. 6 x ÷ 10 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 1.5

What zodiac signs are defensive?
What zodiac signs are defensive?

These Zodiac Signs Are The Most Defensive Taurus Zodiac Signs (April 20 - May 20) Margaret Flatley/Bustle. ... Cancer Zodiac Signs (June 21 - July...

Read More »
Last updated May 14, 2022
What is the most powerful prayer in the Bible?
What is the most powerful prayer in the Bible?

The Lord's Prayer (Matthew 6:9-13): “'Our Father in heaven, Hallowed be your name, Your kingdom come, Your will be done, On earth as it is in...

Read More »
Last updated Dec 7, 2022
Awaken your dormant DNA ability to attract wealth effortlessly
Awaken your dormant DNA ability to attract wealth effortlessly

The simple yet scientifically proven Wealth DNA method laid out in the report allows you to effortlessly start attracting the wealth and abundance you deserve.

Learn More »
Promotion

Exponentiation 1 2 3 4 5 6 7 8 9 10 10x 10 100 1000 10000 100000 1000000 10000000 100000000 1000000000 10000000000 x10 1 1024 59049 1048576 9765625 60466176 282475249 1073741824 3486784401

In science [ edit ]

The SI prefix for 10 is "deca-".

The meaning "10" is part of the following terms:

decapoda, an order of crustaceans with ten feet.

decane, a hydrocarbon with 10 carbon atoms.

Also, the number 10 plays a role in the following:

The atomic number of neon.

The number of hydrogen atoms in butane, a hydrocarbon.

The number of spacetime dimensions in some superstring theories.

The metric system is based on the number 10, so converting units is done by adding or removing zeros (e.g. 1 centimeter = 10 millimeters, 1 decimeter = 10 centimeters, 1 meter = 100 centimeters, 1 dekameter = 10 meters, 1 kilometer = 1,000 meters).

Astronomy [ edit ]

In religion and philosophy [ edit ]

In money [ edit ]

Most countries issue coins and bills with a denomination of 10 (See e.g. 10 dollar note). Of these, the U.S. dime, with the value of ten cents, or one tenth of a dollar, derives its name from the meaning "one-tenth" − see Dime (United States coin)#Denomination history and etymology.

In music [ edit ]

The interval of a major tenth is an octave plus a major third. The interval of a minor tenth is an octave plus a minor third. "Ten lords a-leaping" is the gift on the tenth day of Christmas in the carol "The Twelve Days of Christmas".

In sports and games [ edit ]

Decathlon is a combined event in athletics consisting of ten track and field events. In association football, the number 10 is traditionally worn by the team's advanced playmaker. This use has led to "Number 10" becoming a synonym for the player in that particular role, even if they do not wear that number. [24] In gridiron football, a team has a limited number of downs to advance the ball ten yards or more from where it was on its last first down; doing this is referred to as gaining another first down. In auto racing, driving a car at ten-tenths is driving as fast as possible, on the limit. In a regular basketball game, two teams playing against each other have 5 members each, for a total of 10 players on court. Under FIBA, WNBA, and NCAA women's rules, each quarter runs for 10 minutes. In blackjack, the Ten, Jack, Queen and King are all worth 10 points. In boxing, if the referee counts to 10 whether the boxer is unconscious or not, it will declare a winner by knockout. In men's field lacrosse, each team has 10 players on the field at any given time, except in penalty situations. Ten-ball is a pool game played with a cue ball and ten numbered balls. In most rugby league competitions, the number 10 is worn by one of the two starting props. One exception to this rule is the Super League, which uses static squad numbering.

In rugby union, the starting fly-half wears the 10 shirt.

In ten-pin bowling, 10 pins are arranged in a triangular pattern and there are 10 frames per game.

In technology [ edit ]

Age 10 [ edit ]

This is generally the age when a child enters the preteen stage and also a denarian (someone within the age range of 10–19). The ESRB recommends video games with an E10+ rating to children aged 10 and up.

In other fields [ edit ]

See also [ edit ]

References [ edit ]

en.wikipedia.org - 10 - Wikipedia
Is 100k a year rich?
Is 100k a year rich?

It can be more than enough for an individual or even a small family to live comfortably. With $100,000 a year, a person could cover typical...

Read More »
Last updated May 17, 2020
What items represent money?
What items represent money?

Popular Symbols of Wealth Cornucopia. The Cornucopia is a symbol of abundance specifically related to agriculture as popularized by the Ancient...

Read More »
Last updated May 3, 2020
Awaken your dormant DNA ability to attract wealth effortlessly
Awaken your dormant DNA ability to attract wealth effortlessly

The simple yet scientifically proven Wealth DNA method laid out in the report allows you to effortlessly start attracting the wealth and abundance you deserve.

Learn More »
Promotion
Do bedbugs like cinnamon?
Do bedbugs like cinnamon?

Aside from the mentioned above, the smell of cinnamon is an enemy of bed bugs. The smell can keep bed bugs away as they cannot handle it. You can...

Read More »
Last updated Jul 14, 2021
Awaken your dormant DNA ability to attract wealth effortlessly
Awaken your dormant DNA ability to attract wealth effortlessly

The simple yet scientifically proven Wealth DNA method laid out in the report allows you to effortlessly start attracting the wealth and abundance you deserve.

Learn More »
Promotion
How much does fb pay for reels?
How much does fb pay for reels?

Our Reels Play bonus program, part of our $1 billion creator investment, pays eligible creators up to $35,000 a month based on the views of their...

Read More »
Last updated Jan 21, 2018