Danzig-Wonneberg/Ujescisko https://www.mathematische-basteleien.de/wonneberg2.htm
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inhabitants got in touch with this place in Lübeck and sent
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private Seite
inhabitants got in touch with this place in Lübeck and sent
My view on the Magic Card
Magic Card top Fernando Diaz Ziehl from Mexiko sent
How to produce egg shaped lines by formulas
Fernand Marsal sent me this figure in June 2022, and
About figures formed of equilateral triangles
Name and Manufacturer unknown Sent by Bodo Schnell
tangram facts
7d in 1999/2000) Paul’s Men My grandson Paul (11) sent
How to multiplicate numbers with several digits
Peter Müller from Saarbrücken sent me this method.
How to fold the paper banger
Peter Schuhmacher from Lengnau (Switzerland) sent me
Collection of Domino puzzles
Valerio Bianconi from Italy sent me a solution of a
A Collection of Ladder Problems
Solution with the help of trigonometric formulas sent
Drawing the house of Santa Claus is a children game
Sent by Gerald Fischböck from Vienna He also added