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Unsolved Problems
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Demonstrations 21  40 of 90
The Lonely Runner Conjecture
Mrs. Perkins's Quilts
Packing Disks with Consecutive Integer Radii in a Circle
Van der Waerden's Theorem
Unsolved Conjectures about Egyptian Fractions
Congruent Numbers
NoThreeinLine Problem
Correlating the Mertens Function with the Farey Sequence
Visualizing the Thomson Problem
No Repeated Distances
A Canadian Lottery Wheel
PrimeGenerating Recurrence
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
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