- Level 5 - Easy
- Level 6 - Tricky
- Level 7 - Challenging
- Level 8 - Demanding
- Level 9 - Gruelling
- Level 10 - Mind Boggling
Mathematical Puzzles of Sam Loyd - Book
|Dimensions||8 in x 5 1/2 in x 1/3 in / 20.2 cm x 13.8 cm x 1 cm|
Author: Sam Loyd
Bizarre imagination, originality, trickiness, whimsy characterize puzzles of Sam Loyd, America's greatest puzzler. Present selection from fabulously rare Cyclopedia. 150 period line drawings.
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