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6:45 PM
 
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8:45 PM
@XKCD XKCD #2861 Explained: In mathematics, a variable is any symbol used to represent a number that has a variable definition. The most used variables in math, by far, are x, y, and z, with x being the most generally familiar. According to the comic, the value of x has finally been found, being 4.1083, which is not ...

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