5040 and other Anti-Prime Numbers

998,001 and its Mysterious Recurring Decimals

A Breakthrough in Graph Theory

A Miraculous Proof (Ptolemy's Theorem)

A New Discovery about Dodecahedrons

A Strange Map Projection (Euler Spiral)

Approximating Irrational Numbers

Fundamental Theorem of Algebra

Funny Fractions and Ford Circles

Glitch Primes and Cyclops Numbers

Gödel's Incompleteness Theorem

How did the NSA hack our emails?

How many chess games are possible?

Pentagons and the Golden Ratio

Perfect Shapes in Higher Dimensions

Strange Spheres in Higher Dimensions

The Amazing Heptadecagon (17-gon)

The Daddy of Big Numbers (Rayo's Number)

The Feigenbaum Constant (4.669)

The Golden Ratio (why it is so irrational)

The problem in Good Will Hunting

The Seven Bridges of Königsberg

The Slightly Spooky Recamán Sequence

The Three Square Geometry Problem

Tribonacci Numbers (and the Rauzy Fractal)

UNCRACKABLE? The Collatz Conjecture

What's special about 277777788888899?

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Ramanujan's infinite root and its crazy cousins

The fabulous Fibonacci flower formula

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A Breakthrough in Higher Dimensional Spheres

Dissecting Hypercubes with Pascal's Triangle

The Mathematics of Quantum Computers

Undergraduate Texts in Mathematics