Teach Yourself: Number Training Your Brain

More than 60 million books sold in the Teach Yourself series!
Learn how to train your brain to be quicker, sharper and more acute "Number-Training Your Brain" does much more than give you the skills to tackle math with confidence; it shows how by learning to solve practical problems and perfecting mental arithmetic, you can strengthen all your key thinking skills and astonish friends and family. This is the ultimate mental workout--and the only one to show you how these fun and diverting number games will actually make you smarter, quicker and more acute than any of your peers. Includes: Games and challenges and shows how you can improve your performance in real life situations One, five and ten-minute introductions to key principles to get you started Lots of instant help with common problems and quick tips for success, based on the authors' many years of experience Tests in the book and online to keep track of your progress Quick refreshers to help you remember the key facts