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Combinatorics
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Demonstrations 1  20 of 236
Tiling with Pentominos
Rolling a Cube on a Chessboard
Coverage Probability with the Occupancy Problem
Van der Waerden's Theorem
NowhereNeat Squaring the Square
Congruent Numbers
NoThreeinLine Problem
ErdösSzekeres Tableaux
Social Golfer Problem
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
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