This is the book in which we get solutions of of all NCERT books. NCERT solution books are available different classes. This includes answers of the questions in the NCERT books and also some extra questions .most of the people’s take mathematics NCERT solution books for their questions answer. If your school have NCERT syllabus I recommended you to buy this book because it contains questions answer plus extra questions to solving it is the extra book in NCERT syllabus which give you better view of any chapters. THANKS