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

... sorted by recent user ratings and interest.

 Medical Tests and Bayes' Theorem 4.45 Sum of Cubes and Beyond 4.44 Riemann Hypothesis 4.43 Proof with Words 4.38 Football Field 4.38 Pigeonhole Principle 4.36 Gaps in Primes 4.36 Making Magic Squares 4.35 Van der Waerden Theorem 4.35 Koch Snowflake 4.34 Why an International Date Line? 4.34 Polyhedral Face Vectors 4.31 Perfect Shuffles 4.31 Liouville Numbers 4.31 Squares Ending in 5 4.31 Scrabble Identity 4.30 Largest Known Primes 4.30 One, Two, Three, Pi 4.30 i to the i is a Real Number 4.29 Unbelievable Unlinking 4.28 Goldbach's Conjecture 4.28 Fundamental Group 4.28 Quick Square Roots 4.27 Continuous but Nowhere Differentiable 4.26 Four Fours Problem 4.26 Binary Card Trick 4.26 Complex Roots Made Visible 4.25 Reuleaux Wheel 4.24 Pass the Beer 4.23 Pizza Slices 4.23 Kakeya Needle Problem 4.23 Mind-Reading Number Trick 4.22 Divisibility by Seven 4.22 Thinned-Out Harmonic Series 4.22 Chords of a Unit Circle 4.22 Morley's Theorem 4.22 Vickrey Auction 4.22 Area of a Circle or Regular Polygon 4.21 Spherical Geometry 4.20 Napoleon's Theorem 4.20 Though not among the most popular, your Fun Fact now rates: Area of an Ellipse 4.17 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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