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© 1999-2010 by Francis Edward Su

# Most Popular Math Fun Facts

... sorted by recent user ratings and interest.

 How many Rationals? 4.59 Euler's Product Formula 4.56 Sums of Three and Four Squares 4.55 Chords of an Ellipse 4.55 Wilson's Theorem 4.53 Deal or No Deal 4.49 Continuum Hypothesis 4.48 Odd Numbers in Pascal's Triangle 4.48 Square Root of Two is Irrational 4.47 Rental Harmony 4.45 Morley's Theorem 4.45 Prime Number Theorem 4.44 Spherical Geometry 4.44 Area of a Hyperbolic Wedge 4.44 One Equals Zero! 4.43 i to the i is a Real Number 4.43 Polyhedral Face Vectors 4.43 Four Fours Problem 4.43 Difference of Squares 4.37 Pigeonhole Principle 4.37 Sine of (1/55555....) 4.35 Proof with Words 4.34 One, Two, Three, Pi 4.34 Greedy to Avoid Progressions 4.33 Ellipsoidal Paths 4.33 Pretzel Unlinking 4.31 Taylor-made Pi 4.31 Sperner's Lemma 4.31 Goldbach's Conjecture 4.31 Binary Card Trick 4.31 Klein Bottle 4.30 Proofs without Words 4.29 Does Order of Addition Matter? 4.28 Powers of Ten in Base Two and Five 4.27 Conic sections 4.27 Farmers and Pesky Birds 4.27 Finding the N-th digit of Pi 4.27 Leapfrog Addition 4.27 Computability of Real Numbers 4.26 Pythagorean Triples 4.25 Though not among the most popular, your Fun Fact now rates: Multiplication by 11 3.94 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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