Simulators are needed not only by the body - the brain also needs daily workouts. This book is for those who are ready to hone their minds day after day, learn to think logically and not let their brains "rust." On its pages you will find logical tasks with letters and numbers, dice and cards, dominoes and matches. Look for patterns, solve puzzles, solve entertaining problems. Take a pencil in your hand feel free to start writing right in the book. Unleash your potential by training your brain!