Class 9 · Mathematics · Ch 3

Number System

The World of Numbers

7 board marks Medium ~8h to learn

Not started

8 concepts to cover

8 concepts

Rational numbers on the number lineDensity of rational numbersRational numbers between two rationalsTerminating and recurring decimal expansionsIrrational numbersProof that sqrt(2) and sqrt(3) are irrationalSquare-root spiralReal number line

Quick revision

Under 30 minutes, night-before recap

Complete The World of Numbers Class 9 in One Shot Revision in 15 Min | Class 9 Maths Chapter 3

eSaral Class 8, 9 & 10

HinglishBOARD 13.3 L· 2024YouTube

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Vedantu CBSE 9th

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PW Class 9 - NEEV

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Number Systems - Quick Revision | Class 9 Maths | Chapter 1 | CBSE 2025-26

Magnet Brains

HinglishBOARD 9K· 2026YouTube

Board one-shot

Full chapter in one sitting, Hindi / Hinglish

Number System Class 9 in One Shot 🔥 | Class 9 Maths Chapter 1 Complete Lecture | Shobhit Nirwan

Shobhit Nirwan - 9th

HinglishBOARD 1.4 Cr· 2024YouTube

English one-shot

Same chapter, English medium

CBSE Class 9 Maths | NUMBER SYSTEM One Shot In Pure English

PW Foundation English

EnglishBOARD 45K· 2024YouTube

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PW Foundation English

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Number System Class 9 Maths One-Shot Full Chapter Revision | CBSE Class 9 Exams |BYJU'S Class 9 & 10

BYJU'S - Class 9 & 10

EnglishBOARD 65K· 2022YouTube

Full revision marathonsFor full-syllabus revision only · 8 multi-hour sessions & playlists

Board one-shot

Full chapter in one sitting, Hindi / Hinglish

The World of Numbers Class 9 Chapter 3 ONE SHOT🔥 | New Syllabus 2026-27 | Ritik Mishra

Ritik Mishra - 9th & 10th

HinglishBOARD 17.3 L· 2026YouTube

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Ritik Mishra - 9th & 10th

HinglishBOARD 25.5 L· 2025YouTube

The World of Numbers Class 9 in One Shot🔥| Class 9 Maths Chapter 3 New NCERT

Shobhit Nirwan - 9th

HinglishBOARD 10.4 L· 2026YouTube

Marathon

Multi-hour whole-subject sessions that cover this chapter

Class 9th Maths Half Yearly Marathon 2026🔥 || Complete Syllabus || Half Yearly Exams

PW Class 9 - NEEV

HinglishBOARD 15.4 L· 2026YouTube

Class 9th : Maths Backlog Marathon 🔥 | Next Toppers

Next Toppers

HinglishBOARD 13.2 L· 2026YouTube

Complete Class 9th MATHS In One Shot | All CHAPTERS Rapid Revision 🔥

PW Class 9 - NEEV

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Class 9 Maths FULL SYLLABUS Marathon 💥| Complete MATHS | Final Exam Prep by Pranav Sir

Restart with Motion

HinglishBOARD 8.8K· 2026YouTube

Full course playlist

Complete free lecture series for the subject

Class 9 Mathematics (Ganita Manjari Book) - (By Disha Ma’am) | Complete CBSE Course | All Chapters Available | Session 2026-27

Magnet Brains

HinglishBOARD 1.7 L· 2026Playlist

Pro feature

Hand-picked chapter videos

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PW Foundation English

57K subsEnglishClass 9, 10

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Same PW one-shot format taught in pure English.

Best for: English-medium Class 9-10 learners. · c10-sci · c10-mat

Open channel

Vedantu CBSE 9th

2.2 L subsHinglishClass 9

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Short one-shots (20-30 min) for Class 9, already on new NCERT.

Best for: Quick Class 9 chapter recaps. · c9-legacy-mat · c9-sci

Open channel

Shobhit Nirwan - 9th

18.2 L subsHinglishClass 9

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Calm, very clear maths one-shots that start from zero; updated for Ganita Manjari.

Best for: Class 9 maths, both old and new book. · c9-mat · c9-legacy-mat

Open channel

eSaral Class 8, 9 & 10

6.9 L subsHinglishClass 9, 10

MathsScienceCBSE

Tight 15-minute chapter revisions.

Best for: Quick Class 9 revision. · c9-legacy-mat · c9-legacy-sci

Open channel

Pro feature

Recommended teachers

Unlock everything for ₹999/year — tests, notes, predictor, Genie and all updates.

~~₹2,999~~ · launch offer for the first 100 students

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