Numbers: Histories, Mysteries, Theories Submitted by Adhemar Bultheel | 13 / Mar / 2016 Read more about Numbers: Histories, Mysteries, Theories
100 Geometric Games Submitted by Adhemar Bultheel | 16 / Nov / 2015 Read more about 100 Geometric Games
100 Numerical Games Submitted by Adhemar Bultheel | 16 / Nov / 2015 Read more about 100 Numerical Games
Figures for Fun: Stories, Puzzles and Conundrums Submitted by Adhemar Bultheel | 16 / Nov / 2015 Read more about Figures for Fun: Stories, Puzzles and Conundrums
