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.

See the number 4 with objects that sometimes come to life for a fun surprise! This early math video works great as a "Number of the Day" lesson or as an exciting early math activity for preschool...

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

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.

Welcome to the About The Number 4 page, where we delve into the fascinating world of this unique and ubiquitous digit. As one of the most significant numbers in various fields such as mathematics, …

Jan 18, 2026 · Explore the hidden side of 4, an even number composed of a single prime number multiplied by itself. Includes Prime Factorization, Divisors, Bases and Much More! A fascinating math …

Oct 19, 2023 · Explore fascinating facts about the number 4. Discover its significance in various cultures, including its symbolism and representations in numerology, astrology, and mythology.

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Dec 9, 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 cross (resembling …

"4." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/4. Accessed 08 Feb. 2026. loading examples...