Magic Folding Cube https://www.mathematische-basteleien.de/magiccube.htm
How to make the Magic Folding Cube
You can produce three rectangles with 8 squares each
How to make the Magic Folding Cube
You can produce three rectangles with 8 squares each
Illustrations of Formulas
c+d)= ac+ad -bc-bd Looking for a parallelogram with
My view on Magic Squares
found 86 reductions of 34 to a sum of four summands with
My view on a traditional cube puzzle
quarter-turn (from the front side to the top side), starting with
Do you know chronograms?
the spa museum in Bad Salzuflen you can see a joist with
Description of a new cube puzzle
The object is to build a cube with four chains of pyramids
How to solve the Classic Puzzle Cube
The problem is assembling a cube with all the 12 pieces
How to find a geographical centre.
illustrated by a Java applet you can nicely play with
Über Figuren, die man mit gleichseitigen Dreiecken bilden kann
the cartoon below – The fat bird cannot be tiled with
How to make a monogram
Kögler (1906 to 1977) has developed this playing with