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© 1999-2010 by Francis Edward Su
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# Most Popular Math Fun Facts

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 Continuous but Nowhere Differentiable 4.64 Greedy to Avoid Progressions 4.57 Medical Tests and Bayes' Theorem 4.54 Fractional Dimensions 4.53 Euler's Product Formula 4.53 Risk-Free Betting on Different Beliefs 4.47 Divisibility by Eleven 4.47 Tower of Powers 4.47 Really Complex Matrices 4.46 Sperner's Lemma 4.44 Sine of (1/55555....) 4.44 All Numbers are Interesting 4.41 Napoleon's Theorem 4.39 Reflecting on the Hyperbola 4.38 Difference of Squares 4.35 Rational Irrational Power 4.35 Inductive Tiling 4.35 Continuum Hypothesis 4.33 i to the i is a Real Number 4.32 Polyhedral Face Vectors 4.32 Does Order of Addition Matter? 4.31 How many Primes? 4.31 Fibonacci GCD's, please 4.30 Magic Squares, indeed! 4.30 Perfect Shuffles 4.30 Misleading Sequence 4.30 Reuleaux Wheel 4.30 Liouville Numbers 4.30 Koch Tetrahedron 4.29 Pigeonhole Principle 4.29 Buffon Needle Problem 4.28 Sierpinski-Mazurkiewicz Paradox 4.28 Squares Ending in 5 4.28 Thinned-Out Harmonic Series 4.28 Are Coins Fair? 4.27 Banach-Tarski Paradox 4.27 Multiplying Complementary Pairs 4.25 Proof with Words 4.25 Large Counterexample 4.25 Bike with Square Wheels 4.25 Though not among the most popular, your Fun Fact now rates: Products of Sums of Two Squares 4.12 In addition to these, there are 190 more Fun Fact files. See a random Math Fun Fact. Also available are a list of recent Math Fun Facts, or a list of all Math Fun Facts.

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