Description:
More than 60 new puzzles and stunts based on the properties of numbers. Easy techniques for multiplyingarge numbers mentally, identifying unknown numbers, determining the date of any day in any year, such entertainments as Theost Digit, and Psychic Bridge. Over 30 pages of magic squares, triangles, cubes, more. 76 illustrations.
| Dimensions And Weight |
| Height: |
2 cm |
| Width: |
5.5 cm |
| Weight: |
0.126 kg |
| Depth: |
8.5 cm |
|