Numeric Palindromes https://www.mathematische-basteleien.de/palindromes.html
My view on Numeric Palindromes
You have 9+9+90+90+900+900 = 1998 palindromes up to
Dein Suchergebnis zum Thema: have
Picture Cube Puzzle https://www.mathematische-basteleien.de/cubepuzzle.htm
My view on a traditional cube puzzle
Turning the Cubes top After you have solved one
Tetracube https://www.mathematische-basteleien.de/tetracube.htm
Playings with tetracubes
Rectangular Solids of Tetracubes top The tetracubes have
Magic Hexagon https://www.mathematische-basteleien.de/magichexagon.htm
The magic hexagon and its variants
the sums vertically, horizontally and diagonally have
Snake Cube https://www.mathematische-basteleien.de/snakecube.htm
How to solve the Snake Cube
The reason is that you often have to go back to the
Stars https://www.mathematische-basteleien.de/stars.htm
My contribution to stars
polygon and set isosceles triangles on the sides, which have
Jacob’s Ladder Toy https://www.mathematische-basteleien.de/jacob.htm
How to make Jacob’s Ladder Toy
Jacob’s ladder can have different meanings in German
Hypercube https://www.mathematische-basteleien.de/hypercube.htm
Become familiar with the hypercube
Together the six squares have 6×4=24 sides. 2×5=10
Kaleidocycles https://www.mathematische-basteleien.de/kaleidocycles.htm
Descriptions of some rings of pyramids and how to make them
You have 4-sided pyramids instead of tetrahedra.
Soma Cube https://www.mathematische-basteleien.de/somacube.htm
Playings with Soma Cubes
Altogether you have 1×3 + 6×4 = 27 separate smallcubes