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Demonstrations 21  40 of 249
Constructing a Steiner Tree for Five Points
Generating the Surreal Numbers
0/1Polytopes in 3D
Rubik's Cube
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
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
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