Skip to main content
Super TutorResources
Chapter 11 of 15
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Number Play

CBSE · Class 7 · Mathematics

Quick revision notes for Number Play — CBSE Class 7 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

34 questions64 flashcards5 concepts

Interactive on Super Tutor

Studying Number Play? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 7 students started this chapter today

Key Topics to Revise

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.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Even numbers can be arrangedThe parity of a sum dependsThe sum of any odd numberTwo numbers one apart are consecutiveThe sum of numbers 1

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 Revision Notes

For serious students

Get the full Number Play chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for CBSE Class 7 Mathematics.

Try Super Tutor Free
Try the full chapter — Free