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Mathematics Problems
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Demonstrations 1  20 of 56
Possible Counterexamples to the Minimal Squaring Conjecture
New this month
Mondrian Art Problem
An IMO Triangle Problem
From the Tether Problem to the Involute of a Circle
Descartes's Geometric Solution of a Quadratic Equation
Seven Touching Cylinders Puzzle
Draining of Two Connected Tanks
Making the Three Areas Defined by Congruent Overlapping Circles Equal
Social Golfer Problem
Opposite Coefficients Method for Solving Two Equations in Two Unknowns
Solving a System of Two Linear Equations with Substitution
Lion and Man
The Lucas Ship Problem
Halving the Perimeter of a Zigzag Polygon
The Seven Bridges of Königsberg
Three Equal Segments from the Altitudes of a Triangle
Circumcircles of Two Midpoints and an Altitude
Bisecting the Area and Perimeter of a Triangle
Three Circles with Two Common Tangents
Reflections of a Line through the Orthocenter in the Sides of an Acute Triangle
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