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The Number of the Day: 200,000

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Author and professor Philip M. Parker has written more than 200,000 books - aided in large part by a knowledge-gathering computer program he created himself. Parker refers to himself as “the most published author in the history of the planet.”


Related Fact: Many of Parker’s books are medical reference books. However, he is also the author of a book titled The 2007-2012 Outlook for Tufted Washable Scatter Rugs, Bathmats and Sets That Measure 6-Feet by 9-Feet or Smaller in India, which can currently be purchased on Amazon for $495.


[Sources: The New York Times and Amazon. See previous Numbers of the Day here. ]

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This Puzzling Math Brain Teaser Has a Simple Solution
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Fans of number-based brainteasers might find themselves pleasantly stumped by the following question, posed by TED-Ed’s Alex Gendler: Which sequence of integers comes next?

1, 11, 21, 1211, 111221, ?

Mathematicians may recognize this pattern as a specific type of number sequence—called a “look-and-say sequence"—that yields a distinct pattern. As for those who aren't number enthusiasts, they should try reading the numbers they see aloud (so that 1 becomes "one one," 11 is "two ones," 21 is "one two, one one,” and so on) to figure the answer.

Still can’t crack the code? Learn the surprisingly simple secret to solving the sequence by watching the video below.

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What Number Is The Answer?
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