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The '''interquartile range''' (IQR) is a number that indicates how spread out scores are and tells us what the range is in :1, 2, 2, 2, 3, 4, 6, 8, 8, 8, 8, 8, 9, 11, 11, 14, 14, 15, 15, 29 ...

...ive decay, starting with either 4 atoms per box (left) or 400 (right). The number at the top is how many half-lives have elapsed. Note the [[law of large num ! Number of<br />half-lives<br /> that have happened !! Parts<br />remaining !! As<b ...

...ld tell us how to get the thing in the ''n''-th place, if ''n'' can be any number. If you know what a [[Function (mathematics)|function]] is, this means that ...which is 2. The second number is 2×2, or 4. If we want to know the 100-th number, it's 2×100, or 200. No matter which thing in the sequence we want, the rul ...

In [[mathematics]], a '''base''' or '''radix''' is the number of different [[digit]]s or combination of digits and letters that a system ...there would be no digits). The base of a number may be written next to the number: for instance, <math>23_8 \ </math>means 23 in base 8 (which is equal to 19 ...

{{Infobox number | number = 7 ...

...inite]] number of elements. It is less intuitive for sets with an infinite number of elements. The example below uses two of the simplest infinite sets, that of [[natural number]]s, and that of positive [[fraction (mathematics)|fractions]]. The idea is ...

...umber)|15]] [[16 (number)|16]] [[17 (number)|17]] [[18 (number)|18]] [[19 (number)|19]] &nbsp; [[twenty|20]] &nbsp; ...umber)|25]] [[26 (number)|26]] [[27 (number)|27]] [[28 (number)|28]] [[29 (number)|29]] &nbsp; [[thirty|30]] &nbsp; ...

...also worked with the number, and tried, unsuccessfully, to approximate the number to 32 decimal places, making mistakes on five digits. <ref>{{cite web|last= ...tion.free.fr/Constants/Gamma/gamma.pdf|accessdate=June 26, 2017|date=April 14, 2004}}</ref>: ...

...ound (manipulates) mathematical [[equation]]s and expressions containing [[number]]s and symbols called [[variable]]s. Variables can stand for known or unkno ...[complex number|complex]], [[interval (mathematics)|interval]], [[rational number|rational]], and algebraic numbers. ...

........ and continues without end. Numbers like this are called [[Irrational number|irrational]] numbers. ...gh the diameter and circumference are different for different circles, the number pi remains constant: its value never changes. This is because the relations ...

...wo numbers together. This operation is called '''summation'''. There are a number of ways of writing sums, with the most common being: ...s us that the summation begins at 2, and goes up by 1 until it reaches the number on the top. ...

...d the "[[remainder]]" (such as 14/4 gives 3 with the remainer as 2, as the number {{convert/numdisp|3+2/4}}, same as {{convert/numdisp|3+1/2}} or 3.5). where ''b'' is not [[0 (number)|zero]], then ''a'' divided by ''b'' equals ''c'', written as: ...

...bility theory]] and [[statistics]], the '''median''' is a [[number]]. This number has the property that it divides a set of observed values in two equal halv ...s, the median is defined as the [[mean]] of the two central elements. With 14 observations, this would be the mean of elements 7 and 8, which is their su ...

...group of [[atomic orbitals]] with the same value of the principal quantum number ''n''. ...Electron shells make up the [[electron configuration]] of an [[atom]]. The number of [[electron]]s that can be in a shell is equal to <math>2n^2</math>. ...

'''Standard deviation''' is a number used to tell how measurements for a group are spread out from the average ( ...tists]] commonly report the standard deviation of numbers from the average number in experiments. They often decide that only differences bigger than two or ...

A '''mathematical constant''' is a [[number]], which has a special meaning for [[wikt:calculate|calculation]]s. For exa ** R - [[Rational number]] ...

...wrote a book in 1202, called ''[[Liber Abaci]]''. There he introduced the number pattern to Western European mathematics, although mathematicians in [[India The first number of the pattern is 0, the second number is 1, and each number after that is equal to adding the two numbers right before it together. For ...

A '''square number''', sometimes also called a '''perfect square''', is the result of an [[int ...exponentiation]]), usually pronounced as "''n'' squared". The name square number comes from the name of the shape; see [[#Properties|below]]. ...

...the positive [[divisor]]s of the number (except itself), the result is the number itself. 6 is the first perfect number. Its divisors (other than the number itself: 6) are 1, 2, and 3 and 1 + 2 + 3 equals 6. Other perfect numbers in ...

=== Ramsey number === ...ath> satisfying the condition in the Ramsey theory is called the '''Ramsey number'''. ...