CBSE Class 10 Real Numbers – Free Lesson and Quiz

Learn Euclid's division lemma, prime factorisation, rational and irrational numbers, and decimal expansions. Then take a five-question quiz without signing in.

Euclid's division lemma

For positive integers a and b, there are unique whole numbers q and r such that a = bq + r, where 0 ≤ r < b.

Fundamental theorem of arithmetic

Every composite number has a unique prime factorisation, apart from the order of its factors.

Rational and irrational numbers

Rational decimals terminate or repeat. Irrational decimals neither terminate nor repeat.