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The representation of a zero followed by an infinite number of decimal three's. Can also be written as "0.333.." This number is exactly equal to 1/3, a fact that people with weak mathematical understanding usually don't get. This "controversy" has a tendency to appear again and again in various forums and discussions and places on the net, to the annoyance of everyone. Proof: x = 0.333.. 10x = 3.333.. 10x - x = 3.333.. - 0.333.. 9x = 3 x = 1/3
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