Der Rubik’s Cube wird 50 Jahre alt (via nytimes.com):
«Mathematicians and hobbyists have had a half-century of fun exploring the 43 billion billion permutations of Erno Rubik’s creation.»
Der Rubik’s Cube wird 50 Jahre alt (via nytimes.com):
«Mathematicians and hobbyists have had a half-century of fun exploring the 43 billion billion permutations of Erno Rubik’s creation.»