**0 - Simple English Wikipedia, the free encyclopedia**
https://simple.wikipedia.org/wiki/0

WebAny number divided by itself equals one, except if that number is zero. In symbols: 0 ÷ 0 = "not a number." In time, zero means "now". For example, when a person is counting down the time to the start of something, such as a foot race or when a rocket takes off, the count is: "three, two, one, zero (or go )".

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