Here you can download Universal Self Scorer mathematics PDF. USS mathematics is well known book in market. It’s has good volume of problems especially great quality and quantity of question for JEE Mains exam. I think it covers less topics for JEE advanced. But a CBSE student can easily recollect his memory once he refers this book as most of the concepts and problems related are from ncert which is good as majority of problems comes directly from ncert.
Even advanced exam consist direct questions of around 40 percent where the book excels to give the clear knowledge
(or) Buy the original hard copy books from amazon to support the author and for easy preparation. Due to the copyright strikings i cannot provide you the PDFs for latest updated versions since it is illegal. So i strongly recommend to buy latest 2020 version from the amazon link given below.