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Number System — Concept Maps

Punjab Board · Class 9 · Mathematics

3 concept maps of Number System for Punjab Board Class 9 Mathematics, each also written out as a text outline.

43 questions28 flashcards10 formulas & key relations5 concepts

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A nested Venn diagram illustrating the relationships between natural numbers (N), integers (Z), rational numbers (Q), and real numbers (R) as subsets of each other.
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3 Concept Maps

Real Number System Classification

Real Number System Classification

The map in words

  • Real Numbers
    • Rational Numbers
      • Integers
        • Whole Numbers
          • Natural Numbers
        • Negative Integers
      • Fractions
        • Proper Fractions
        • Improper Fractions
        • Decimals Terminating
        • Decimals Recurring
    • Irrational Numbers
      • Square Roots
        • Perfect Squares
        • Non-Perfect Squares
      • Cube Roots
      • Pi and Constants
      • Non-Recurring Decimals

Number System Classification and Relationships

Number System Classification and Relationships

The map in words

  • Number System
    • Real Numbers R
      • Rational Numbers Q
        • Integers Z
          • Whole Numbers W
            • Natural Numbers N
          • Negative Integers
        • Fractions
          • Proper Fractions
          • Improper Fractions
          • Mixed Numbers
      • Irrational Numbers
        • Square Roots
          • Perfect Squares
          • Non-Perfect Squares
        • Cube Roots
        • Pi and variants
        • Non-recurring decimals
    • Properties
      • Density Property
      • Decimal Expansions
        • Terminating
        • Non-terminating Recurring
        • Non-terminating Non-recurring
      • Operations
        • Addition
        • Subtraction
        • Multiplication
        • Division

A mind map showing the hierarchical classification of the real number system, illustrating how each category is nested within the larger categories

A mind map showing the hierarchical classification of the real number system, illustrating how each category is nested within the larger categories

The map in words

  • Real Numbers
    • Rational Numbers
      • Integers
        • Whole Numbers
          • Natural Numbers
    • Irrational Numbers
      • Square Roots
      • Pi
      • Special Patterns

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Frequently Asked Questions

What are the important topics in Number System for Punjab Board Class 9 Mathematics?
Key topics in Number System include Types of Numbers and Their Hierarchy, Irrational Numbers and Locating Them on the Number Line, Decimal Expansions of Real Numbers, Operations on Real Numbers and Rationalisation. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Number System show?
The 3 maps show how the ideas in Number System connect: Real Number System Classification; Number System Classification and Relationships. Each map is also written out as an outline on this page.
How should I revise Number System for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Number System. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Number System

All Punjab Board Class 9 Mathematics Concept Maps

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