Puzzles and Problems

Yakob Perelman made considerable efforts to awaken interest in the exact sciences among children and adults. In his books, he skillfully combined simplicity and clarity of formulations with incredible inventiveness.
This edition includes over one and a half hundred various tasks, riddles, and puzzles – on logic, counting, and attentiveness. Astronomical problems and tasks on geometric planes, puzzles with numbers, clocks, and matches, and riddles inspired by the famous "Traveling of Gulliver" will help spend time usefully and refresh knowledge from school courses in mathematics, geometry, geography, and physics.