Open Sentences - JSS1 Mathematics Past Questions and Answers - page 1

1

Which of the following is an example of using a letter to represent a number?

A

2+3=5

B

𝑥+2=7

C

10−4=6

D

8×3=24

correct option: b
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2

Which of the following is a closed sentence?

A

𝑦+4=9

B

3+5=8

C

𝑥−2=5

D

2𝑦= 10

correct option: b
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3

What is the solution to the open sentence 𝑥+6=11?

A

4

B

5

C

6

D

7

correct option: c
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4

Which of the following is an open sentence?

A

4+5=9

B

𝑥×3=15

C

6÷2=3

D

7−3=4

correct option: b
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5

Given the open sentence 2𝑦−3=5, which value of 𝑦 makes the sentence true?

A

3

B

4

C

6

D

5

correct option: a
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6

What is the value of 𝑥 in the open sentence 𝑥−4= 10?

A

14

B

6

C

10

D

16

correct option: a
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7

Identify the open sentence:

A

12×2=24

B

15+𝑥=20

C

8−3=5

D

10÷5=2

correct option: b
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8

What number from the set {1, 2, 3, 4} satisfies the open sentence 3𝑥=9?

A

1

B

2

C

3

D

4

correct option: c
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9

Which of the following sentences is closed?

A

𝑦×4= 16

B

7+2=9

C

𝑥−1= 5

D

5𝑦= 25

correct option: b
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10

What is the value of 𝑦 in the open sentence 3𝑦+6=15?

A

1

B

2

C

3

D

4

correct option: c
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