Chapter 1 – Real Numbers is the foundation of Class 10 Mathematics and introduces important concepts that are used throughout higher mathematics. In this chapter, you will learn about Euclid’s Division Lemma, Fundamental Theorem of Arithmetic, prime factorisation, HCF (Highest Common Factor), LCM (Least Common Multiple), and the decimal expansion of rational numbers. You will also understand the difference between rational and irrational numbers and learn how to determine whether the decimal expansion of a rational number is terminating or non-terminating recurring.

This chapter is highly important for the CBSE Class 10 Board Examination, as questions are regularly asked from topics such as HCF & LCM, irrational numbers, Euclid’s Division Lemma, and decimal expansions. A strong understanding of these concepts will also help you in later chapters and competitive examinations.

On this page, you’ll find everything you need to master Chapter 1 in one place, including complete video lessons, detailed study notes, formula sheets, mind maps, NCERT Textbook Solutions, NCERT Exemplar Solutions, Important Questions, Previous Year Questions (PYQs), MCQs, Competency-Based Questions (Assertion & Reason and Case Study Questions), Practice Worksheets, and Sample Papers. These resources are carefully designed according to the latest CBSE syllabus and exam pattern to help you build strong concepts, revise effectively, and prepare confidently for your board examinations.