Class 7 Mathematics Chapter 6: Number Play — practice questions with answers
Free practice for Class 7 Mathematics, Chapter 6: Number Play. Try the solved questions below, then take a free test with instant marking and explanations.
30 questions8 easy, 15 medium, 7 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. In the height game, what does each child call out?
- The number of children in front who are taller than them
- Their own height
- Their roll number
- The number of shorter children
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Answer: A. The number of children in front who are taller than them
Why: The rule: each child says how many children in front of them are taller. [p.128]
Why: The rule: each child says how many children in front of them are taller. [p.128]
Q2. The property of a number being even or odd is called its ______.
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Answer: parity
Why: We use the word parity for being even or odd. [p.131]
Why: We use the word parity for being even or odd. [p.131]
Q3. What is the parity of 42 × 78?
- Even
- Odd
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Answer: A. Even
Why: If either number is even, the product is even. [p.132]
Why: If either number is even, the product is even. [p.132]
Q4. Which formula gives the nth odd number?
- 2n − 1
- 2n
- n + 1
- 2n + 2
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Answer: A. 2n − 1
Why: The nth even number is 2n, and the nth odd number is one less: 2n − 1. [p.133]
Why: The nth even number is 2n, and the nth odd number is one less: 2n − 1. [p.133]
Q5. What is the 100th odd number?
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Answer: 199 (± 0)
Why: 2 × 100 − 1 = 199. [p.133]
Why: 2 × 100 − 1 = 199. [p.133]
Q6. In a magic square made with the numbers 1 to 9, what must the magic sum be?
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Answer: 15 (± 0)
Why: The three equal row sums add to 45, so each is 15. [p.135]
Why: The three equal row sums add to 45, so each is 15. [p.135]
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Frequently asked questions
How many practice questions are there for Class 7 Mathematics Chapter 6: Number Play?
30 questions (8 easy, 15 medium, 7 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 7 Mathematics syllabus, used by CBSE and many state boards.