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2. Names of small numbers - Wikipedia

   en.wikipedia.org/wiki/Names_of_small_numbers

   The following table lists the names of small numbers used in the long and short scales, along with the power of 10, engineering notation, and International System of Units (SI) symbols and prefixes. [1] [page needed] [2] [page needed] [3] [page needed] [4] [5] [6] [7]

3. List of types of numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_numbers

   Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.

4. Strong law of small numbers - Wikipedia

   en.wikipedia.org/wiki/Strong_Law_of_Small_Numbers

   Guy gives Moser's circle problem as an example. The number of points (n), chords (c) and regions (r G). The first five terms for the number of regions follow a simple sequence, broken by the sixth term. Guy also formulated a second strong law of small numbers: When two numbers look equal, it ain't necessarily so! [3]

5. List of mathematical constants - Wikipedia

   en.wikipedia.org/wiki/List_of_mathematical_constants

   For example, the constant π may be defined as the ratio of the length of a circle's circumference to its diameter. The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set.

6. Number - Wikipedia

   en.wikipedia.org/wiki/Number

   In mathematics, the notion of number has been extended over the centuries to include zero (0), [3] negative numbers, [4] rational numbers such as one half (), real numbers such as the square root of 2 and π, [5] and complex numbers [6] which extend the real numbers with a square root of −1 (and its combinations with real numbers by adding or ...

7. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   An example is the function that relates each real number x to its square x 2. The output of a function f corresponding to an input x is denoted by f(x) (read "f of x"). In this example, if the input is −3, then the output is 9, and we may write f(−3) = 9. The input variable(s) are sometimes referred to as the argument(s) of the function.