World of Numbers Class 9 PPT & Notes – Ganita Manjari Ch 3

Class 9 Maths Ganita Manjari Chapter 3 – The World of Numbers PPT & Notes

Download the complete The World of Numbers Class 9 PPT (43 slides) with notes, free from Unique Study Point. Covers the full Chapter 3 of the new NCERT Ganita Manjari textbook (Session 2026-27) — no login, no sign-up needed.

What this Class 9 Maths PPT covers

Natural numbers, whole numbers, the invention of zero, integers, rational numbers, irrational numbers and real numbers — with properties (closure, commutative, associative, distributive), terminating and non-terminating decimal expansions, and number line representation.

India's mathematical heritage

Brahmagupta's rules for zero and negative numbers (fortune and debt), the Ishango Bone and its primes 11, 13, 17, 19, Baudhayana's Shulbasutra and the value of root 2 — the historical topics now asked in case-based questions.

Also useful for exam practice

The slides support NCERT Exercise Sets 3.1 to 3.5, MCQs, assertion-reason and case-study style questions from the chapter.

Why Unique Study Point is different

We are the only site giving you a ready-made 43-slide presentation for this chapter — not just notes. Students revise faster, teachers teach directly. 100% free, no login, no sign-up.

Try the Interactive Square Root Spiral Lab

NCERT Fig. 3.14 asks you to find the hypotenuse lengths of every right triangle in the square root spiral. Instead of only reading the answer, build the spiral yourself — triangle by triangle — and watch √2, √3, √4, √5 appear one after another. Open the free Square Root Spiral Lab — mark √x on the number line, design your own spiral, and check your construction instantly. Works on mobile, no login needed.

More Free Class 9 Maths PPTs

Continue with our Orienting Yourself: The Use of Coordinates Class 9 PPT (Chapter 1) and Linear Polynomials Class 9 PPT (Chapter 2) — both free, no login.

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