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Unsolved Problems
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Demonstrations 21  40 of 80
Minimally Squared Rectangles
OrchardPlanting Problem
abc Conjecture
The Reve's Puzzle
The Game of Boxes
Collatz Conjecture on a Circle
Slide and Swap on Cubic Graphs
The Function Computed by the Wolfram 2,3 Turing Machine
Sendov's Conjecture
SpaceFilling Tetrahedra
Tightly Packed Squares
Pentagon Tilings
Heilbronn Volumes
Labeling the Integer Heptagon
Packing Squares with Side 1/n
Small Lattice Ellipses
Beraha's Conjecture, Wheels, and Cyclic Graphs
The 2(64,8,1) Design
NoFourInPlane Problem
The FourRunner Problem
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