The NCERT solutions for Class 9 Mathematics, Chapter 1 – Number System provide a detailed understanding of rational and irrational numbers, real numbers, and their properties. The chapter includes MCQ-based questions, exercise questions, and short-answer questions, helping students strengthen their ...

A rational number is any number that can be expressed as the fraction p/q, where p and q are integers, and q ≠ 0. Rational numbers include integers, terminating decimals, and repeating decimals. Examples: 1/2, -3, 0.75, 5. They can ...