Sawan Presents Set Of 3 Mental Maths Books | Part 4, 5 & 6 book for kids. Mental Maths is a series of five books that enables the student to practise and master the fundamental concepts of mathematics. Developed by a schoolteacher with more than 30 years of experience, the graded series methodically covers the entire syllabus of primary school mathematics. Each worksheet consists of examination pattern based questions related to a particular topic that ensures that the student gets adequate amount of practice.