A number is a mathematical object used to count, measure, and label. The most basic examples are the natural numbers 1, 2, 3, 4, and so forth. Numbers...

In mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted i, called the imaginary...

In mathematics, a real number is a number that can be used to measure a continuous one-dimensional quantity such as a distance, duration or temperature...

In fluid dynamics, the Reynolds number (Re) is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the...

The following are lists of films which have been placed number one at the weekend box office in a region. Contents 1948–1959 1960–1969 1970–1979 1980–1989...

A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic...

the number 1 differently than larger numbers, sometimes even not as a number at all. Euclid, for example, defined a unit first and then a number as a...

In mathematics, a rational number is a number that can be expressed as the quotient or fraction ⁠ p q {\displaystyle {\tfrac {p}{q}}} ⁠ of two integers...

This is a list of countries by the number of millionaires by net worth (in United States dollars) based on an annual assessment of wealth and assets compiled...

is the natural number following 58 and preceding 60. Fifty-nine is the 17th prime number, and 7th super-prime. The next prime number is sixty-one, with...