2³ ×3² ×5×7 ×13 √2 ∞

NCERT Mathematics · Class 10 · Chapter 1

Real Numbers

From the Fundamental Theorem of Arithmetic to the irrationality of √2 — explore the deep structure of numbers through animated, interactive lessons.

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BYJU'S Books · NCERT 2026-27 Reprint

Contents

NCERT Mathematics Class 10 — Chapter 1: Real Numbers

Unit 1 — Number Theory
1
Fundamental Theorem of Arithmetic
Prime factorisation · HCF & LCM · Proving irrationality 12 min
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2
Revisiting Irrational Numbers
Proofs · √p is irrational · Properties Coming soon
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3
Decimal Expansions of Rationals
Terminating · Non-terminating · Denominator test Coming soon
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p/q · HCF × LCM = a × b