Cbse has decided to conduct two levels of examinations, namely, basic-level and standard-level in Mathematics for Class 10 from the session 2020-2021 onwards. Basic-level examination has been introduced to reduce the pressure on the students who do not want to pursue Mathematics after Class X. Consequently, difficulty level of mathematics-basic is less than- that of mathematics-standard. It is therefore pertinent to have a separate book for the students opting for basic level examination. The present book ‘mathematics-basic’ Has been written to cater the need of such students. The presentation of subject matter and. Style of writing this book is exactly same as the mathematics-standard except the reduced difficulty level. I hope, similar to the mathematics-standard, this book will also be liked by teachers and students as well.