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Puzzles and Recreations: Advanced
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Demonstrations 101  120 of 154
Circular Coverings
FourPiece Dissection of Juel's Pyramid to a Prism
Hanegraaf's Rectangular Block of Size 2×1×1 to a Cube Dissection
Decomposition of the Tetrahedron into Four Congruent Symmetrical Parts
Bennett's OctagontoSquare Dissection
Brodie's PentagontoSquare Dissection
Quadrilateral Slide
Interactive Rings Tessellation
Egyptian Fractions
Buffon's Needle Problem
Constructing a Regular Pentagon with Ruler and Compass
Sicherman Dice
The Troublesome Twelve Circle Problem
FourColor Maps
3n+1 Flying Saucers
Consecutive Heads or Tails
Clean Tile Problem
The Drake Equation
Miura Map Folding and Unfolding
Romeo and Juliet
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