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.

Created by teachers, learn how to show 4 in a ten frame. Learn to draw 4 tally marks. See the number 4 with objects that sometimes come to life for a fun surprise!

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.

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

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 …

Oct 19, 2023 · In physics, the four fundamental forces of nature are gravity, electromagnetism, strong nuclear force, and weak nuclear force. The number 4 holds great significance in many …

Explore the curious properties of number 4, an even composite number composed of a single prime multiplied by itself. Includes mathematical info, prime factorization, divisors, bases and …

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 …

Number 4 symbolizes building a strong foundation. There are four cardinal points: North – South – East – West. There are four winds. There are four phases of the moon. There are four …

"4." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/4. Accessed 19 Dec. 2025. loading examples...