Who invented the number 4?!

Calculus
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Who invented the number 4?!

Oct 3rd, 2015

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4 (four/ˈfɔər/) is a numbernumeral, and glyph. It is the natural number following 3 and preceding 5. Four is the only number that has the same number of characters as its value in the English language.[1]

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Oct 3rd, 2015

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