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# Who invented the number 0?

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The concept of zero first appeared in A.D. 976. The Persian encyclopedist Muhammad ibn Ahmad al-Khwarizmi observed that if no number appeared in the tens place, then an empty circle represented a placeholder. However, the mathematician Fibonacci is generally recognized as the inventor of the number zero.

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Both the concept of zero and the number itself have had a myriad of origins. First introduced as a placeholder, zero itself came to be used as a number over time.

The exact etymology of zero is disputed by various languages with possible influences including the French "zéro," the Venetian "zero" and the Italian "zefiro." Linguists tend to agree that the progenitor of the term zero originates from the Arabic "safira," which means, "It was empty."

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## Related Questions

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The concept of the mathematical constant pi dates back approximately 4000 years to ancient Mesopotamia. Babylonian mathematicians found that the area of a circle was figured by taking the square of the radius, multiplied by their closest approximation of pi, which was 3.

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The history of whole numbers is as old as the concept of counting itself, but the first written whole numbers appeared between 3100 and 3400 B.C. Prior to that time, whole numbers were written as tally marks, and there are records of tally marks denoting whole numbers that date back to 30,000 B.C.

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The number one is neither prime nor composite. Prime numbers are those defined as natural numbers greater than one not divisible by any other numbers but one and itself. Composite numbers have at least one additional positive divisor and include all whole numbers greater than one that are not prime.