Kolams and Sona https://www.mathematische-basteleien.de/kolams.htm
Kolams and Sona
If a ray of light is sent into the rectangle from the
Meintest du seit?
Kolams and Sona
If a ray of light is sent into the rectangle from the
Tricks with paper strips
Dish of a strip top Helmut Bichler sent me a dish and
How to make the Froebel star
They sent three or four stars to those as a Christmas
Playings with Pentominos
Darian Jenkins sent me the following datas.
My view on Numeric Palindromes
02.02.2020 Counter on my main page on 2.9.2009, sent
How to make a paper boat
Samayne Phillips from South Australia sent me the Australian
Playings with numbers
1978) Manick Srinivasan and Ramkumar Ramamoorthy sent
Playings with tetracubes
Solution, sent by Darian Jenkins …
The magic hexagon and its variants
He heard of the magic hexagon by a letter sent by Clifford
How to solve the 15puzzle
Now in August 2004 Martin Beckenkamp sent me an email