Table of Contents

1 The Wonders of a Planiverse.- 2 Bulgarian Solitaire and Other Seemingly Endless Tasks.- 3 Fun with Eggs, Part I.- 4 Fun with Eggs, Part II.- 5 The Topology of Knots.- 6 M-Pire Maps.- 7 Directed Graphs and Cannibals.- 8 Dinner Guests, Schoolgirls, and Handcuffed Prisoners.- 9 The Monster and Other Sporadic Groups.- 10 Taxicab Geometry.- 11 The Power of the Pigeonhole.- 12 Strong Laws of Small Primes.- 13 Checker Recreations, Part I.- 14 Checker Recreations, Part II.- 15 Modulo Arithmetic and Hummer's Wicked Witch.- 16 Lavinia Seeks a Room and Other Problems.- 17 The Symmetry Creations of Scott Kim.- 18 Parabolas.- 19 Non-Euclidean Geometry.- 20 Voting Mathematics.- 21 A Toroidal Paradox and Other Problems.- 22 Minimal Steiner Trees.- 23 Trivalent Graphs, Snarks, and Boojums.