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Chapter 6: Number Play Notes

Home / Class Notes / Class 7 / Mathematics / Chapter 6: Number Play
✓ Free notes Class 7 Mathematics 1 study file

About these notes

Class 7 Maths Chapter 6 Number Play notes explain place and face value, expanded form, divisibility tests, prime (अभाज्य संख्या) and composite (भाज्य संख्या) numbers, factors and multiples, prime factorisation, HCF (महत्तम समापवर्तक) and LCM (लघुत्तम समापवर्त्य) techniques with worked examples. Main sub-topics: place & face value, writing numbers in expanded form, comparing/ordering, divisibility rules (2,3,4,5,6,8,9,10,11), prime factorisation (e.g., 2³ × 3² × 5), HCF and LCM methods, and quick revision tips. For CBSE and Bihar Board Class 7 students preparing school unit tests, chapter tests and board-pattern mock tests on Merit Spring ROH.

Key points you will learn

  • Class 7 Maths Chapter 6 Number Play notes
  • Place value vs face value and expanded form rules
  • Divisibility tests: 2,3,4,5,6,8,9,10,11 with examples
  • Prime (अभाज्य संख्या) and composite (भाज्य संख्या) identification
  • Prime factorisation and HCF (महत्तम समापवर्तक) / LCM (लघुत्तम समापवर्त्य) via 2³ × 3² × 5
  • Quick shortcuts: sum-of-digits test for 3 and 9; alternating-sum for 11
  • Tips to compare large numbers and avoid common place-value errors
  • Practice strategy: timed chapter test questions and revision checkpoints

What is inside this chapter

📄

Number Play - Chapter 6 Notes (Class 7 Maths)

Class 7 Maths Number Play - Chapter 6 handwritten-style revision notes for CBSE and Bihar Board students.

📥 Open notes

Questions students ask

What is covered in Class 7 Maths Chapter 6 Number Play notes?

The notes cover place and face value, expanded form, comparing numbers, divisibility rules, prime and composite numbers, factors and multiples, prime factorisation, and HCF/LCM methods with stepwise examples and quick revision points.

How to do divisibility tests in Number Play?

Use digit-based rules: even/last digit for 2 and 5, last two digits for 4, sum-of-digits for 3 and 9, combined rules for 6, and alternating-sum for 11; practice examples show each step clearly.

Difference between prime and composite numbers?

A prime (अभाज्य संख्या) has exactly two distinct factors: 1 and itself; a composite (भाज्य संख्या) has more than two factors. The notes list small-number checks and quick identification tips.

Where to find Class 7 Number Play important questions and MCQ?

The chapter notes are on Merit Spring ROH; for practice questions and MCQs use the site-wide chapter tests and board-pattern mock tests available on the platform to check speed and accuracy.

How to practise HCF and LCM questions from this chapter?

Use prime factorisation—express numbers as products of primes (for example 2³ × 3² × 5), take common lowest powers for HCF and highest powers for LCM, then solve similar chapter-test problems to build speed.

← Previous chapter Chapter 5: Parallel and Intersecting Lines

More Mathematics chapters

Chapter 1: Large Numbers Around Us Chapter 2: Arithmetic Expressions Chapter 3: A Peek Beyond the Point Chapter 4: Expressions Using Letter Numbers Chapter 5: Parallel and Intersecting Lines Chapter 7: A Tale of Three Intersecting Lines All chapters →

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