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Recreational Mathematics
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Demonstrations 21  40 of 936
Seven Touching Cylinders Puzzle
WireWorld Gates and Gadgets
Octahedra Constructed from Eight Identical Triangles
The Lucas Magic Square
Tetrads
Hinged Dissections: From Three Squares to One
Visualizing the Collatz Conjecture and Some Variants
Irreptiles
Benford's Law and Data Spread
Koman Surfaces
Draining of Two Connected Tanks
Three Crossings Puzzle
Iterating the Collatz Map on Real and Complex Numbers
Koman Variations
Reversi
Neat Alternating Tilings of the Plane
Anamorphic Origami
Magic Squares for Odd, Singly Even, and Doubly Even Orders
Solving Decanting Problems by Graph Theory
27 Coins Balance Puzzle
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