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Liczba 4 jest: najmniejszą naturalną liczbą złożoną, jedynym niebędącym liczbą pierwszą indeksem wyrazu ciągu Fibonacciego będącego liczbą pierwszą. W systemie dziesiętnym liczba całkowita jest podzielna przez 4 wtedy i tylko wtedy, gdy liczba utworzona z jej dwóch ostatnich cyfr jest podzielna przez 4.
4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5 . It is a square number , the smallest semiprime and composite number , and is considered unlucky in many East Asian cultures.
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. [1] Numbers can be represented in language with number words. More universally, individual numbers can be represented by symbols, called numerals; for example, "5" is a numeral that represents the number ...
Quaternary / kwəˈtɜːrnəri / is a numeral system with four as its base. It uses the digits 0, 1, 2, and 3 to represent any real number. Conversion from binary is straightforward.
4 (number) The number four is a number and a numeral. It comes after the number three, and before the number five. In Roman numerals, it is IV.
Algebraic number: Any number that is the root of a non-zero polynomial with rational coefficients. Transcendental number: Any real or complex number that is not algebraic. Examples include e and π. Trigonometric number: Any number that is the sine or cosine of a rational multiple of π.
Integer number 4 From Wikipedia, the free encyclopedia. 4 (number) This article is about the number. For the years, see BC 4 and 4 AD. For other uses, see 4 (disambiguation), IV (disambiguation) and Number 4. 4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5.
