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How KenKen Puzzles Work
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KenKen puzzles involve filling a number grid, with the added element of mathematical cages. Learn how KenKen puzzles work at HowStuffWorks.
What Did Isaac Newton Discover? 10 of Sir Isaac Newton's Inventions
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Almost 300 years after his death, Sir Isaac Newton remains one of the most influential thinkers in history. What are some of his most enduring inventions?
6 Mysterious Numbers in the Bible and What They Mean
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The Bible is full of numbers that often get repeated, like 7, 12 and 40. Why is this and do these numbers have any special hidden meanings?
The Youngest Person to Graduate College Was Only 10 Years Old
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Some kids go from finger painting to finals faster than most people can say "graduation."
5 Challenging Math Games
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Math games require all your brain's firepower to win. Check out 5 challenging math games at HowStuffWorks.
What Exactly Is Mensa? How Smart Do You Have to Be to Join?
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What exactly is Mensa? How smart do you have to be to join?
Did the ancient Greeks get their ideas from the Africans?
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The ancient Greeks could have gotten all of their revolutionary ideas from civilizations in Africa. Learn about the ancient Greeks and ancient Greek ideas.
How Astrolabes Work
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Astrolabes are exquisitely crafted instruments that have hundreds of uses. Isn't it time you learned how to use this handy decoder of the sky?
How M.C. Escher Worked
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M.C. Escher was an incredibly talented artist. Visit HowStuffWorks to learn all about M.C. Escher.
Differences Between Rational and Irrational Numbers
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Rational numbers can be expressed as the ratio of two integers, while irrational numbers, such as square roots of non-square numbers, cannot.