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The Number of the Day: 6'

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Full grown coconut crabs have been known to grow as large as 6-feet in length. The massive arthropods – which can weigh as much as 30 pounds – cannot swim, but can climb trees and are strong enough to crack open the tree-fruit that gives them their name.


Related Story: One theory about the coconut crab surmises that they were directly responsible for the death of famed pilot Amelia Earhart.


[Source: Environmental Graffiti. 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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