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4 (number)

From Simple English Wikipedia, the free encyclopedia
← 3 4 5 →
-1 0 1 2 3 4 5 6 7 8 9
Cardinalfour
Ordinal4th
(fourth)
Numeral systemquaternary
Factorization22
Divisors1, 2, 4
Greek numeralΔ´
Roman numeralIV
Roman numeral (unicode)Ⅳ, ⅳ
Greek prefixtetra-
Latin prefixquadri-/quadr-
Binary1002
Ternary113
Quaternary104
Quinary45
Senary46
Octal48
Duodecimal412
Hexadecimal416
Vigesimal420
Base 36436
Greekδ (or Δ)
Arabic٤,4
Persian۴
Urdu
Ge'ez
Bengali
Chinese numeral四,亖,肆
Korean넷,사
Devanagari
Telugu
Malayalam
Tamil
Hebrewארבע (Arba, pronounced AR-bah) or ד (Dalet, 4th letter of the Hebrew alphabet)
Khmer
Thai
Kannada
Pronunciation of the number 4

The number four is a number and a numeral. It comes after the number two, and before the number five. In Roman numerals, it is IV.

Mathematics

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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 hand and four toes on each foot.[source?] Four squared is 16, and four doubled is 8.

In geometry, quadrilaterals or tetragons are a kind of shapes called polygons have four sides and vertices, to which squares are quadrilaterals with sides of same length and vertices of the same wideness.

Visualization

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Imagine you have 3 Bananas, if John gives you one more, now you have four Bananas. Another way, is visualizing a Square or a Rectangle, each of these basic shapes have four sides (4). "Duck" has 4 letters, D-U-C-K. "D" is the 4th letter in the Alphabet (A, B, and C presisting D)

A Leap year is every 4 Year (with the exception of every 100, and that exception has the excpetion of every 400 years), You also (if you're normal) have 2 legs and 2 arms, which would directly translate to 2+2, which is the same as 2(2), which is the same as 2^2, which is the same as 2/x = 0.5 solve for x, these are all 4, as 4 is the 4th Whole number in the Numeral system.

How to draw the number 4

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Start with drawing a right triangle with the right angle pretruding towards the south east (quadrant IV) then take the two non-hypotenuse sides, and continue them outward in a straight line away from the hypotenuse.