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Syllabus

Number Play

CBSE · Class 7 · Mathematics

Complete topic list for Number Play in CBSE Class 7 Mathematics. Key concepts, sub-topics, and what to focus on for board exams.

34 questions64 flashcards5 concepts

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4 Topics · CBSE Class 7 Mathematics

Topics in Number Play

1

1. Height-Arrangement Counting Rule

  • Each child says the number of children in front who are taller than them.
  • The number depends on the order of children, not on the total number of children alone.
  • A child who is tallest among the children in front says 0.
2

2. Even, Odd, and Parity

  • An even number can be arranged in pairs without leftovers.
  • An odd number cannot be arranged in pairs; it is one more than a collection of pairs.
  • Parity means whether a number is even or odd.
3

3. Parity of Sums and Differences

  • even + even = even
  • odd + odd = even
  • even + odd = odd
4

4. Grids, Row Sums, and Magic Squares

  • The sum of numbers 1 to 9 is 45.
  • In a solved 3x3 number grid using 1-9, the sum of all circled numbers is always 90.
  • The sum of the circled numbers across all three rows, or all three columns, is always 45.

Key Concepts

Central concept: Number Play

Numbers tell us thingsParityEven numbersOdd numbersConsecutive numbersSums of even and odd numbersKishor's card puzzleLakpa's coin puzzle

Frequently Asked Questions

What are the important topics in Number Play for CBSE Class 7 Mathematics?
Number Play covers several key topics that are frequently asked in CBSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Number Play — CBSE Class 7 Mathematics?
Understand the core concepts first, then work through the 34 practice questions available for this chapter. Revise formulas and 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 Play

All 15 chapters — CBSE Class 7 Mathematics Syllabus

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