Mathematical Quickies: 270 Stimulating Problems with Solutions Dover Books on Mathematical & Word Recreations Autor Charles W. Trigg 30 sep 1985 Paperback Preț: 71.48 lei 3-5 săpt.
Discovering Mathematics: The Art of Investigation Dover Books on Mathematical & Word Recreations Autor A. Gardiner 30 noi 2006 Paperback Preț: 76.93 lei 3-5 săpt.