Questions on Single Variable Expressions
Multiple-choice questions for Grade 6 on the topic Single Variable Expressions. Each question has five answer choices (A–E), and at the end, you'll find a detailed answer key with explanations.
Single Variable Expressions – Grade 6
Multiple-Choice Questions
1. What does the expression 3x mean?
A) x + 3
B) x ÷ 3
C) x − 3
D) 3 × x
E) x³
2. Which expression shows "5 more than a number x"?
A) 5 − x
B) x + 5
C) 5 ÷ x
D) x − 5
E) x × 5
3. What is the value of the expression 2x + 4, if x = 3?
A) 6
B) 10
C) 8
D) 9
E) 12
4. Which of these is equivalent to x × 7?
A) 7x
B) x + 7
C) x − 7
D) 7 + x
E) x ÷ 7
5. What is the expression for "a number y decreased by 6"?
A) y + 6
B) y − 6
C) 6 − y
D) y × 6
E) y ÷ 6
6. Simplify: 4x + 3x
A) 12x
B) 7x
C) 3x + 4x
D) 8x
E) x⁷
7. Evaluate: 5x − 2, when x = 4
A) 18
B) 10
C) 20
D) 5
E) 3
8. Which expression means "twice a number n"?
A) n + 2
B) 2n
C) n − 2
D) n × n
E) n²
9. What is x + x + x + x written as a multiplication expression?
A) 3x
B) 5x
C) 4x
D) x⁴
E) x + 4
10. What is the value of 10 − x, when x = 6?
A) 16
B) 6
C) 4
D) 10
E) −4
11. Which expression is equal to "three less than a number y"?
A) y − 3
B) 3 − y
C) y + 3
D) 3y
E) y ÷ 3
12. What is the value of 3x + 2, if x = 5?
A) 15
B) 17
C) 13
D) 10
E) 8
13. Which expression is equal to "half of a number a"?
A) 2a
B) a − 2
C) a ÷ 2
D) a²
E) a + 2
14. Simplify the expression: x + x + x
A) x³
B) 3x
C) x + 3
D) x × 3
E) 2x
15. Which of the following is a variable expression?
A) 4 + 7
B) x − 3
C) 10
D) 2 × 5
E) 12 ÷ 3
16. Evaluate: x² − 1, when x = 3
A) 6
B) 9
C) 8
D) 7
E) 10
17. What is the expression for “a number m divided by 4”?
A) 4 ÷ m
B) m + 4
C) m ÷ 4
D) m − 4
E) m × 4
18. If x = 2, what is the value of 7 − x + 1?
A) 8
B) 7
C) 5
D) 6
E) 9
19. Which is a correct expression for “the sum of a number n and 8”?
A) 8 − n
B) n + 8
C) n × 8
D) n ÷ 8
E) 8n
20. What does the expression 2(x + 3) mean?
A) 2x + 3
B) 2x + 6
C) x + 5
D) 2x − 3
E) 2 + x + 3
- Questions on Whole Number Exponents
- Questions on Values Written as Powers
- Questions on Numerical Expression Evaluation: Basic Operations and Grouping Symbols
Answer Key with Explanations
1. D) 3 × x – "3x" means 3 times the value of x.
2. B) x + 5 – "5 more than a number x" translates to x + 5.
3. B) 10 – 2 × 3 = 6; 6 + 4 = 10.
4. A) 7x – x × 7 is the same as 7x (order doesn't matter in multiplication).
5. B) y − 6 – "Decreased by" means subtraction.
6. B) 7x – Combine like terms: 4x + 3x = 7x.
7. A) 18 – 5 × 4 = 20; 20 − 2 = 18.
8. B) 2n – "Twice" a number means 2 times the number.
9. C) 4x – Adding x four times is 4x.
10. C) 4 – 10 − 6 = 4.
11. A) y − 3 – "Three less than" means subtract 3.
12. B) 17 – 3 × 5 = 15; 15 + 2 = 17.
13. C) a ÷ 2 – "Half of a number" means divide by 2.
14. B) 3x – x + x + x is 3x.
15. B) x − 3 – A variable expression includes a variable (like x).
16. C) 8 – 3² = 9; 9 − 1 = 8.
17. C) m ÷ 4 – "Divided by 4" means divide m by 4.
18. D) 6 – 7 − 2 = 5; 5 + 1 = 6.
19. B) n + 8 – "Sum of" means add.
20. B) 2x + 6 – Use distributive property: 2(x + 3) = 2x + 6.
Share Online!
