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The Number of the Day: $125,000,000

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In 1999 NASA lost $125 million because a team of engineering contractors erroneously used English measurements rather than metric. Let’s hope today’s Space Shuttle launch goes a lot more smoothly.


Related Fact: The United States, Liberia and Myanmar are the only three countries in the world that don’t use the metric system as their primary system of measurement.


[Sources: CNN and Gizmodo . 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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