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A box of riddles and tricks

14.99 €
Out of stock
A box of riddles and tricks
14.99 €
How do you write a number with one hundred and five units? How do you arrange nine coins in ten rows with three coins in each row? Which year of the nineteenth century is four and a half times larger when looked at in a mirror? I have half as many sisters and brothers. And my sister has half as many sisters as brothers. How many of us are there? Riddles and clues, questions and jokes, intricate drawings, imaginary miracles, funny arithmetic problems, entertaining experiments - in front of you a whole box of fascinating puzzles and tricks! The best guide to the world of entertaining sciences - Yakov Isidorovich Perelman - will help you solve them. Do not hurry to look at the answers. Try to solve all the puzzles yourself: it will give pleasure to both children and adults. For children of secondary school age.
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