Most Popular Math Fun Facts

• Visual Multiplication with Lines 4.63
• Greedy to Avoid Progressions 4.59
• Surface Area of a Sphere 4.56
• Kaprekar's Constant 4.54
• Squaring Quickly 4.53
• How many Primes? 4.53
• Pi Approximations 4.52
• Pretzel Unlinking 4.52
• Right Double Cone 4.51
• One Equals Zero! 4.48
• Goldbach's Conjecture 4.46
• Banach-Tarski Paradox 4.46
• How many Rationals? 4.45
• Multiplication by 111 4.43
• Reuleaux Wheel 4.42
• Products of Sums of Two Squares 4.42
• Sums of Three and Four Squares 4.39
• All Horses are the Same Color 4.37
• Gabriel's Trumpet 4.37
• Zero to the Zero Power 4.37
• Hailstone Numbers 4.36
• Pythagorean Triples 4.36
• Morley's Theorem 4.36
• Quick Square Roots 4.35
• Sine of (1/55555....) 4.35
• Magic 1089 4.34
• Sphere Eversions 4.34
• Euler's Product Formula 4.33
• Fermat's Last Theorem 4.33
• Area of an Ellipse 4.33
• Sliding Chords 4.33
• Wilson's Theorem 4.33
• Misleading Sequence 4.33
• Continuous but Nowhere Differentiable 4.33
• Fibonacci GCD's, please 4.32
• Are Coins Fair? 4.32
• Sperner's Lemma 4.32
• Polyhedral Face Vectors 4.31
• Bike with Square Wheels 4.31
• Rolling Polygons 4.31

• Though not among the most popular, your Fun Fact now rates: i to the i is a Real Number 4.11

See a random Math Fun Fact. Also available are a list of recent Math Fun Facts, or a list of all Math Fun Facts.