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Demonstrations 181  200 of 372
Disappearing Lines around a Circle
Some Simple Logic Problems
A Domino Puzzle
Lights On/Lights Out Game and Solver
Maximum Fruit Salad
Number of Cubes Removed
Parallelogram Dissection Paradox
5x5x5 Pentacube Puzzle
Number of Cannonballs in Piles of Different Shapes
Triangulation Maze
The Reve's Puzzle
4×4 Lock Problem
Martin Gardner's April Fool's Map
River Crossing Puzzle
Polar Maze
Mazes on a Cone, Including Its Base
The Four Numbers Game
Some Numbers behind Rubik's Cube
Sum of Empty Skies for a Set of Planets
Coin Shuffle
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