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The Number of the Day: 1 in 10,000

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Why are four-leaf clovers considered so lucky? Because they are so very rare - occurring in only about 1 out of 10,000 clovers specimen.


Related Fact: What's the most clover leaves anyone has found? In 2009, Shigeo Obara of Japan found (well, created) a 56-leaf-clover through natural crossbreeding. He'd previously been recognized by Guinness for an 18-leaf-clover found in 2002. Obara died in 2010.


[Sources: Science Base, Japan Today and Guinness World Records. 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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