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

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 How many Rationals? 4.59 Chords of an Ellipse 4.53 Deal or No Deal 4.52 Odd Numbers in Pascal's Triangle 4.52 Wilson's Theorem 4.52 Square Root of Two is Irrational 4.50 Euler's Product Formula 4.50 Proof with Words 4.49 Continuum Hypothesis 4.47 Four Fours Problem 4.47 Spherical Geometry 4.46 Area of a Hyperbolic Wedge 4.46 Rental Harmony 4.45 Polyhedral Face Vectors 4.43 Morley's Theorem 4.43 Pigeonhole Principle 4.42 Birthday Problem 4.39 Prime Number Theorem 4.38 i to the i is a Real Number 4.38 Ellipsoidal Paths 4.36 Greedy to Avoid Progressions 4.36 Sums of Three and Four Squares 4.35 Sine of (1/55555....) 4.34 One Equals Zero! 4.33 Pretzel Unlinking 4.31 Taylor-made Pi 4.31 Sperner's Lemma 4.31 Powers of Ten in Base Two and Five 4.31 Klein Bottle 4.30 One, Two, Three, Pi 4.30 Does Order of Addition Matter? 4.30 Leapfrog Addition 4.30 Goldbach's Conjecture 4.28 Pi Approximations 4.28 Binary Card Trick 4.28 Finding the N-th digit of Pi 4.28 Euler's Formula 4.27 Farmers and Pesky Birds 4.27 Computability of Real Numbers 4.26 Proofs without Words 4.26 Though not among the most popular, your Fun Fact now rates: Multiplying Complementary Pairs 4.07 In addition to these, there are 188 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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