- 4 - Wikipedia
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
- 4 (number) - New World Encyclopedia
4 (four) is a number, numeral, and glyph that represents the number It is the natural number [1] that follows 3 and precedes 5 It is an integer and a cardinal number, that is, a number that is used for counting [2] In addition, it is classified as a real number, [3] distinguishing it from imaginary numbers
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Watch live streaming of our TV channels - Channel 4, E4, More4, Film4 and 4seven
- Four Fours Puzzle - Solution - Math is Fun
Solution to the puzzle: A popular mathematical pastime: Use exactly four 4s to form every integer from 0 to 50, using only the operators
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All the emotion, drama and suspense of America's most chilling murder trials are captured in Killer Cases - where love, sex, betrayal and greed ultimately prove fatal Part of True Crime on Channel 4
- Number 4 - Facts about the integer - Numbermatics
Your guide to the number 4, an even composite number composed of a single prime multiplied by itself Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun
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