Video narration
In Class 10, “real numbers” means every number that can be placed on the number line. Real numbers include two main groups: rational and irrational numbers. Rational numbers can be written as p by q, where p and q are integers and q is not zero—like 3/4, -2, or 0.5. Their decimal form either ends, like 1.25, or repeats, like 0.333…. Irrational numbers cannot be written as p by q—like √2 or π. Their decimals go on forever without repeating. Together, rational and irrational numbers make the complete real number set. A key idea: between any two real numbers, you can always find another real number, so the number line is densely filled. That’s the big picture of real numbers.