Class 7 Mathematics Chapter 4: Expressions using Letter-Numbers — practice questions with answers
Free practice for Class 7 Mathematics, Chapter 4: Expressions using Letter-Numbers. Try the solved questions below, then take a free test with instant marking and explanations.
31 questions10 easy, 14 medium, 7 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. Shabnam is 3 years older than Aftab. If Aftab is 18, how old is Shabnam?
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Answer: 21 (± 0)
Why: Shabnam’s age = a + 3 = 18 + 3 = 21. [p.81]
Why: Shabnam’s age = a + 3 = 18 + 3 = 21. [p.81]
Q2. If s is Shabnam’s age, which expression gives Aftab’s age (Aftab is 3 years younger)?
- s − 3
- s + 3
- 3s
- 3 − s
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Answer: A. s − 3
Why: Aftab is 3 years younger, so a = s − 3. [p.82]
Why: Aftab is 3 years younger, so a = s − 3. [p.82]
Q3. Letters like a and s that stand for numbers are called letter-______.
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Answer: numbers
Why: Such letters are called letter-numbers; expressions using them are algebraic expressions. [p.82]
Why: Such letters are called letter-numbers; expressions using them are algebraic expressions. [p.82]
Q4. What is the formula for the perimeter p of a regular hexagon with side s?
- p = 6s
- p = s + 6
- p = 4s
- p = 6 + 6s
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Answer: A. p = 6s
Why: A regular hexagon has 6 equal sides: p = 6s. [p.84]
Why: A regular hexagon has 6 equal sides: p = 6s. [p.84]
Q5. Find the value of 83 + 28 − 13 + 32 by swapping and grouping.
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Answer: 130 (± 0)
Why: (83 − 13) + (28 + 32) = 70 + 60 = 130. [p.86]
Why: (83 − 13) + (28 + 32) = 70 + 60 = 130. [p.86]
Q6. Find the value of 5m + 3 when m = 2.
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Answer: 13 (± 0)
Why: 5 × 2 + 3 = 13. [p.87]
Why: 5 × 2 + 3 = 13. [p.87]
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Frequently asked questions
How many practice questions are there for Class 7 Mathematics Chapter 4: Expressions using Letter-Numbers?
31 questions (10 easy, 14 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.