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...
22 Oct 2026 · Class 9
Class 9 Maths (Ganita Manjari) Chapter 6: Measuring Space: Perimeter and Area
This chapter is about measuring the length around a shape and the space inside it. It explains π as the ratio C...