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© 1999-2010 by Francis Edward Su

# Most Popular Math Fun Facts

... sorted by recent user ratings and interest.

 Gabriel's Trumpet 4.62 Pythagorean Triples 4.60 Borsuk-Ulam Theorem 4.56 Proof with Words 4.54 Sums of Three and Four Squares 4.51 Rental Harmony 4.49 Perfect Shuffles 4.49 Two Envelopes Paradox 4.48 Rising Sequences in Card Shuffling 4.48 Rubber Bands Stuck on a Torus 4.47 Leapfrog Addition 4.46 Fibonacci GCD's, please 4.44 Spherical Geometry 4.42 Successive Differences of Powers 4.42 Goldbach's Conjecture 4.42 Fibonacci Number Formula 4.40 Equidecomposability 4.38 Hairy Ball Theorem 4.37 All Numbers are Interesting 4.37 Chords of an Ellipse 4.37 Right Double Cone 4.37 Space-filling Curves 4.37 Ants on a Stick 4.36 Hugging the Equator 4.35 Sperner's Lemma 4.34 Cantor Set 4.33 Reflecting on the Hyperbola 4.33 One, Two, Three, Pi 4.33 Area of a Circle or Regular Polygon 4.33 Mug Trick 4.32 Seven Shuffles 4.32 Dominoes on a Chessboard 4.32 Drunken Walker and Fly 4.32 Squares Ending in 5 4.31 Ellipsoidal Paths 4.30 Shortest Pythagorean Proof? 4.30 Cantor Diagonalization 4.29 Tower of Powers 4.29 Red-Black Card Trick 4.29 Rationals Dense but Sparse 4.29 Though not among the most popular, your Fun Fact now rates: Sums of Two Squares 4.29 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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