It gives my team at Radian Books and me immense pleasure to present to you our latest title Sample Papers for Class-X Mathematics for CBSE Board Examinations 2021. It took a little longer than usual to release this book because there were two major changes in this year’s curriculum. As per the new CBSE guidelines, the syllabus of Class-X Board Examinations has been reduced because of the pandemic. Also, CBSE has introduced case-study-based questions for the Mathematics Class X Board Examinations 2021. Such questions comprise mathematics questions that are based on real-life stories and require the application of mathematics in real-life situations. I have taken care to ensure that the case studies created for this book are as close as possible to the questions that will be asked in the board examinations. Along with this new type of questions, we have also kept in mind the changed marking scheme.