Mathematische Basteleien https://www.mathematische-basteleien.de/
Topics include Flexagon, Soma Cube, Pentominos, Cube-it, Rubik’s Cube, Froebel’s Star, Tangram, House of Santa Claus, Chronogram, Numeric Palindromes. English/German.
Schnitt…04/2008 13 983 816…04/2009 Pascalsches Dreieck