About the book: 1998 / You can “treat” anyone with puzzles from this collection. Firstly, himself - to once again be convinced of his own genius. Secondly, his friends - to once again make fun of their very dubious mental abilities. Thirdly, our children - to instill in them an interest in algebra and geometry with the help of our most exciting puzzles. By the way, attention, teachers! Many of our puzzles can become a real decoration for your lessons.!