22 Oct 2026 · Class 9
Class 9 Science (Exploration) Chapter 1: Exploration: Entering the World of Secondary Science
This chapter explains what science really is and how secondary science is different from earlier classes. It shows how scientists use models,...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 14: Math of Space: Surface Area and Volume
This chapter explains the difference between surface area and volume and gives the formulas for cuboids, cubes, cylinders, cones, pyramids, spheres and...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 13: Two Variables, One Line
This chapter is about linear equations in two variables, ax + by + c = 0, and their straight-line graphs. It explains...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 12: Quadrilaterals
This chapter defines a quadrilateral exactly and explains convex and non-convex 4-gons. It proves the properties of parallelograms and the tests for...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 11: The World of Algorithms
This chapter explains what an algorithm is: a precise step-by-step procedure to solve a problem. It uses the column addition method and...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 10: How Quantities Combine: Understanding Data
This chapter shows how averages combine when groups of different sizes are put together. It covers mixtures and concentration, the weighted mean,...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 9: Propositions and their Converses
This chapter explains what a proposition is and how most mathematical statements take the form 'If X, then Y'. It shows how...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 8: Predicting What Comes Next: Exploring Sequences and Progressions
This chapter is about sequences, ordered lists of numbers that follow a pattern. It explains explicit and recursive rules, the Virahānka–Fibonacci sequence,...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 7: The Mathematics of Maybe: Introduction to Probability
This chapter introduces probability as a way to measure how likely an event is. It explains random experiments, the probability scale from...