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  1. 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 …

  2. 4 (number) - Simple English Wikipedia, the free encyclopedia

    In mathematics, the number four is an even number and the smallest composite number. Four is also the second square number after one. A small minority of people have four fingers on each …

  3. Learn About the Number 4 | Number of the Day: 4 | Four with

    Learn to recognize and understand Number 4. Learn to count up to and down from four. Created by teachers, learn how to show 4 in a ten frame. Learn to draw 4...

  4. 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 …

  5. 4 - definition of 4 by The Free Dictionary

    Define 4. 4 synonyms, 4 pronunciation, 4 translation, English dictionary definition of 4. Noun 1. 4 - the cardinal number that is the sum of three and one IV, Little Joe, quadruplet, quartet, …

  6. 4 - Wiktionary, the free dictionary

    Mar 21, 2025 · 4 (prev 3, next 5) The cardinal number four. A digit in the decimal system of numbering, and also in octal, and hexadecimal. (phonetics, often superscript) The pitch of a …

  7. About The Number 4 - Numeraly

    The number 4 is the only digit in the English language that has the same number of letters as its numerical value. It is also the smallest composite number, as it is the product of two prime …

  8. Why Do Some Cultures Believe the Number Four Is Unlucky?

    Sep 20, 2023 · Tetraphobia, the fear of the number four, has a profound influence on business decisions in these cultures. To thrive, businesses often ensure their phone numbers, product …

  9. 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 …

  10. 4 - Definition, Meaning & Synonyms | Vocabulary.com

    Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement.