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Demonstrations 21  40 of 245
Van der Waerden's Theorem
NowhereNeat Squaring the Square
Congruent Numbers
NoThreeinLine Problem
ErdösSzekeres Tableaux
Ways to Lace Your Shoes
Counting Necklaces
Polygons on n Vertices
Paths through a Grid
Pascallike Triangles Made from a Game
Simple 2Column Polyominoes on the Hexagonal Lattice
Random Closed Meanders
Ways of Stepping One, Two, or Three Stairs Up a Stairway
Shortening the 29th Olympic Torch Tour
Polyform Explorer
Pascallike Triangles Mod k
Lattice Path Interpretations
No Repeated Distances
Grid Packing at an Angle
A Canadian Lottery Wheel
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