Math nerds rejoice at arbitrary line-up of dates

If numerical coincidences are your thing, you were probably overjoyed last week when the number of the month and the number of the date were the same number, and if you multiplied them together, you got the number of the year! Square root days happen nine times every century, and this year a teacher in Redwood City even offered $339 to whoever planned the biggest event to celebrate. The next won't happen until 4/4/16, but in the meantime you can cheer Avagadro's Number every year on October 23. Read more...

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