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The Number of the Day: 28,800

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In 2005, author Donovan Hohn set out to locate 28,800 rubber ducks that had been lost at sea 13 years earlier. His experiences have been recounted in a new book with the gloriously descriptive title Moby-Duck: The True Story of 28,800 Bath Toys Lost at Sea and of the Beachcombers, Oceanographers, Environmentalists and Fools, Including the Author, Who Went in Search of Them.


Related Fact: The “Rubber Duckie” song popularized by Ernie on Sesame Street spent nine weeks on the Billboard Hot 100 chart in 1970 and was nominated for a Grammy Award.

[Sources: NPR and Muppet Wiki. 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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