NCERT Class 7 Maths Chapter 4 Expressions using Letter Numbers MCQ Questions with Answers

Class 7 Maths Chapter 4 MCQs

1. What is a variable?
A. A fixed number
B. A letter representing an unknown value
C. A mathematical operation
D. A constant value
Answer: B

2. In the expression 7x + 5, the variable is:
A. 7
B. 5
C. x
D. 12
Answer: C

3. In the expression 9a − 4, the constant term is:
A. 9
B. a
C. −4
D. 4a
Answer: C

4. The coefficient of x in 12x is:
A. x
B. 12
C. 1
D. 0
Answer: B

5. How many terms are there in 4a + 5b − 9?
A. 2
B. 3
C. 4
D. 5
Answer: B

6. Evaluate 5x + 2 when x = 4.
A. 18
B. 20
C. 22
D. 24
Answer: C

7. Simplify: 6a + 3a
A. 9a
B. 18a
C. 3a
D. 6a
Answer: A

8. Simplify: 10m − 4m
A. 4m
B. 6m
C. 14m
D. 40m
Answer: B

9. Write an expression for "a number increased by 12."
A. x − 12
B. 12 − x
C. x + 12
D. 12x
Answer: C

10. Write an expression for "seven times a number."
A. x + 7
B. 7 + x
C. 7x
D. x ÷ 7
Answer: C

11. Evaluate 2a − 5 when a = 9.
A. 11
B. 13
C. 18
D. 23
Answer: B

12. Which of the following is an algebraic expression?
A. 15 + 8
B. x + 6
C. 25 ÷ 5
D. 18 − 9
Answer: B

13. The value of 3p + 1 when p = 6 is:
A. 18
B. 19
C. 20
D. 21
Answer: B

14. Variables are mainly used to:
A. Represent unknown quantities
B. Replace numbers permanently
C. Show only constants
D. Write tables only
Answer: A

15. Algebraic expressions are useful because they:
A. Represent mathematical relationships
B. Help solve equations and real-life problems
C. Use variables and constants together
D. All of the above
Answer: D