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Mathematical holiday: Summer 1964

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The reason given was: Pure vandalism (CSD A3)
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Tuesday, June 30, 1964

It has now been 1,963.495 years since the start of the Common Era. The number 1,963.495 is special because it is the area of a circle with radius 25: pi × 252 = 3.14159265 × 625 = 1963.4954.


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