Professor and Doctor of Medicine Ryuta Kawashima offers simple and effective exercises for training the brain This notebook contains tasks for adding 4 numbers and filling in gaps in examples. Do you feel that memory began to change you? Can not remember someone's name or the right word? Performing simple calculations in the mind is given to you much more difficult than ten years ago? Do not worry: brain functions, like bodies, gradually decrease after thirty. But if exercise helps keep the body in good shape, what does modern science offer for brain health? Ryuta Kawashima has found effective ways to train the brain that will improve its performance. To do this, you only need to solve simple mathematical examples .. This notebook continues the series of manuals for the development of memory and intelligence “Training the brain” and contains tasks for adding four numbers and filling in gaps in examples. By exercising regularly for only five minutes a day, you will be able to develop memory and keep your mind clear.