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Izidor Hafner
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Demonstrations 401  420 of 771
Folding a Mitre into a Gnomon
Loyd's Dissection of a Clipped Rectangle to a Square
Drawing a Logarithmic Spiral
Trisecting an Angle Using Tschirnhaus's Cubic
Inconsistent Sets of Statements from Knights and Knaves
Number of Horizontal Rhombuses
Truth Tellers on Tuesdays
Seating Friends around a Table
Logic Metapuzzle Generator
A Puzzle about Labeled Logicians
Alternative on the Island of Knights and Knaves
Stable and Unstable Faces of Antiprisms
Tangent on a Logarithmic Spiral
Radius of Curvature of Catenary
How Old Were Some Famous Mathematicians?
Sylvester's Postage Stamp Problem
Inconsistent Set of Statements
Heppes's TwoTip Tetrahedron
Trick to Multiply by N1 in Base N
Disappearing Lines in a Rectangle
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