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© 1999-2010 by Francis Edward Su

# Most Popular Math Fun Facts

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 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 Continuum Hypothesis 4.49 Deal or No Deal 4.49 Odd Numbers in Pascal's Triangle 4.48 Square Root of Two is Irrational 4.47 Area of a Hyperbolic Wedge 4.46 Rental Harmony 4.45 Morley's Theorem 4.45 Spherical Geometry 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 Proof with Words 4.34 One, Two, Three, Pi 4.34 Prime Number Theorem 4.34 Ellipsoidal Paths 4.33 Greedy to Avoid Progressions 4.33 Sine of (1/55555....) 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 Isoperimetric Inequality 4.25 Though not among the most popular, your Fun Fact now rates: Kaprekar's Constant 3.70 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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