5 minutes to think. Collection of the best Soviet puzzles (1950)
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At what speed should the car move so that the red light of the traffic light seems to the driver green? What is heavier - a ton of wood or iron? Why is a stream murmured? If you and your child like fascinating puzzles and tasks, then this book is for you. It contains dozens of unusual tasks in physics, geography, astronomy and other sciences, as well as chess sketches, mathematical and optical tricks and crosswords of different levels of complexity. Thinking about them, you will train logic and learn many curious scientific facts. And if some task still is beyond strength, then at the end of each section you will find answers with a detailed comment on how to correctly build reasoning. With the help of illustrations, the tasks become even more interesting, and many of them - for example, crosswords or chess - can be solved immediately in the book
Cover:
Cover:Hard
Category:
- Category:Children's Book
- Category:Cookbooks, Food & Wine
- Category:Crosswords, games and puzzles
Series:
Series: Soviet Heritage
ISBN:
ISBN:978-5-907508-08-8
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