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  1. 4 - Wikipedia

    Approximately four weeks (4 times 7 days) to a lunar month (synodic month = 29.54 days). Thus the number four is universally an integral part of primitive sacred calendars.

  2. 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...

  3. 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 …

  4. 4 (number) - New World Encyclopedia

    Four is the second square number (a "square number" is an integer that can be written as the square of some other integer) and the second centered triangular number.

  5. 4 - Wiktionary, the free dictionary

    Jun 21, 2025 · A West Arabic numeral, ultimately from Indic numerals (compare Devanagari ४ (4)), a cursive form of four lines (to represent the number four) arranged in the shape of a …

  6. 4 - definition of 4 by The Free Dictionary

    Noun 1. 4 - the cardinal number that is the sum of three and one IV, Little Joe, quadruplet, quartet, quatern, four, quaternion, quaternity, tetrad,...

  7. 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 …

  8. About The Number 4 - Numeraly

    Discover the fascinating world of the number 4! Explore its meanings, facts, religious significance, angel number interpretations, and its role in arts and literature.

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

    Sep 20, 2023 · In many East Asian cultures, including China, Korea, Japan and Taiwan, the number four is steeped in superstition. This fear of the number four, or tetraphobia, holds so …

  10. FOUR Definition & Meaning - Merriam-Webster

    The meaning of FOUR is a number that is one more than three. How to use four in a sentence.

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