This book is a true guide to paradoxes, from the ancient (Achilles and the tortoise) to the modern (Schrodinger's cat and Turing's paradox). According to the authors, paradox is “the magic in your head.” What to do if intuition suggests one thing, but logic dictates another? Witty examples collected under one cover are an excellent means of training attentiveness, memory and mathematical skills. Some of the paradoxical assumptions are wrong, others can be confirmed, but in any case, to test them you will need patience and ingenuity. The publication is addressed to everyone who is interested in non-standard mathematical problems.