Q1. The mean of the five numbers 12, 15, 9, w, 14 is 13. The value of w is
- 15
- 13
- 16
- 65
NCERT · Class 8
NCERT Class 8 Mathematics: Chapter List and Official PDFs
All 14 chapters of the NCERT Class 8 Mathematics textbook(s), with the section headings of each chapter and a link to the official PDF on ncert.nic.in. Open a chapter to see what it covers.
14 chapters2 books
Ganita Prakash Part-I
Chapter 1: A Square and A Cube
- 1.1 Square Numbers
- 1.2 Cubic Numbers
- 1.3 A Pinch of History
Chapter 2: Power Play
- 2.1 Experiencing the Power Play ...
- 2.2 Exponential Notation and Operations
- 2.3 The Other Side of Powers
- 2.4 Powers of 10
- 2.5 Did You Ever Wonder?
- 2.5 A Pinch of History
Chapter 3: A Story of Numbers
- 3.1 Reema’s Curiosity
- 3.2 Some Early Number Systems
- 3.3 The Idea of a Base
- 3.4 Place Value Representation
Chapter 4: Quadrilaterals
- 4.1 Rectangles and Squares
- 4.2 Angles in a Quadrilateral
- 4.3 More Quadrilaterals with Parallel Opposite Sides
- 4.4 Quadrilaterals with Equal Sidelengths
- 4.5 Playing with Quadrilaterals
- 4.6 Kite and Trapezium
Chapter 5: Number Play
- 5.1 Is This a Multiple Of?
- 5.2 Checking Divisibility Quickly
- 5.3 Digits in Disguise
Chapter 6: We Distribute, Yet Things Multiply
- 6.1 Some Properties of Multiplication
- 6.2 Special Cases of the Distributive Property
- 6.3 Mind the Mistake, Mend the Mistake
- 6.4 This Way or That Way, All Ways Lead to the Bay
Chapter 7: Proportional Reasoning-1
- 7.1 Observing Similarity in Change
- 7.2 Ratios
- 7.3 Ratios in their Simplest Form
- 7.4 Problem Solving with Proportional Reasoning
- 7.5 Sharing, but Not Equally!
- 7.6 Unit Conversions
Ganita Prakash Part-II
Chapter 1: Fractions in Disguise
- 1.1 Fractions as Percentages
- 1.2 Percentage of Some Quantity
- 1.3 Using Percentages
Chapter 2: The Baudhāyana-Pythagoras Theorem
- 2.1 Doubling a Square
- 2.2 Halving a Square
- 2.3 Hypotenuse of an Isosceles Right Triangle
- 2.4 Combining Two Different Squares
- 2.5 Right–Triangles Having Integer Sidelengths
- 2.6 A Long-Standing Open Problem
- 2.7 Further Applications of the Baudhāyana - Pythagoras Theorem
Chapter 3: Proportional Reasoning-2
- 3.1 Proportionality — A Quick Recap
- 3.2 Ratios in Maps
- 3.3 Ratios with More than 2 Terms
- 3.4 Dividing a Whole in a Given Ratio
- 3.5 A Slice of the Pie
- 3.6 Inverse Proportions
Chapter 4: Exploring Some Geometric Themes
- 4.1 Fractals
- 4.2 Visualising Solids
Chapter 5: Tales by Dots and Lines
- 5.1 The Balancing Act
- 5.2 Visualising and Interpreting Data
Chapter 6: Algebra Play
- 6.1 Algebra Play
- 6.2 Thinking about ‘Think of a Number’ Tricks
- 6.3 Number Pyramids
- 6.4 Fun with Grids
- 6.5 The Largest Product
- 6.6 Decoding Divisibility Tricks
Free sample questions
Three sample questions with answers. Full explanations — and the rest of the question bank — are free to read after you sign up.
Q2. The cube root of 13824 is
- 24
- 18
- 26
- 36
Q3. The word 'isometric', from Greek, means:
- equal angle
- equal measure
- three dimensions
- same shape
Show answer
Correct answer: B. equal measure
🔒 The full explanation is free to read after you sign up →
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Chapter lists follow the NCERT textbooks as available to us; textbooks are revised from time to time, so confirm on ncert.nic.in.
Related pages
- NCERT Class 8 English
- NCERT Class 8 Hindi
- NCERT Class 8 Sanskrit
- NCERT Class 8 Science
- NCERT Class 8 Social Science
- NCERT Class 10 Mathematics
- NCERT Class 11 Mathematics
- NCERT Class 12 Mathematics
- NCERT Class 6 Mathematics
- NCERT Class 7 Mathematics
- NCERT Class 9 Mathematics
- NCERT Class 8
- NCERT Books, Class 6 to 12