Mathematics

Number Systems

Charkive StartersNumbers
How did zero go from a placeholder to a number?

Zero first marked empty places in written numbers, in Babylon and elsewhere. It became a number with its own arithmetic rules in India, where Brahmagupta set them out in 628 AD.

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Charkive StartersNumbers
Why can't you divide by zero?

Division is defined as the inverse of multiplication, and nothing multiplied by zero can give a nonzero answer. Assigning any value to 1/0 leads to a contradiction, so mathematicians leave it undefined.

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