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Question (11)

QN0026576

Evaluate: 7/12 + 5/18

(A) 31/36
(B) 11/18
(C) 17/36
(D) 5/6

Correct Answer: A

Explanation:

21/36 + 10/36 = 31/36

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Question (12)

QN0026577

Which decimal represents a rational number?

(A) 0.313113111…
(B) 0.818181…
(C) 0.1010010001…
(D) π

Correct Answer: B

Explanation:

Repeating decimals are rational.

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Question (13)

QN0026578

The additive identity for rational numbers is:

(A) 1
(B) –1
(C) 0
(D) 1/2

Correct Answer: C

Explanation:

Adding zero does not change the number.

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Question (14)

QN0026579

Which of the following is irrational?

(A) √64
(B) √81
(C) √90
(D) √100

Correct Answer: C

Explanation:

90 is not a perfect square.

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Question (15)

QN0026580

Convert 17/25 into decimal form.

(A) 0.17
(B) 0.68
(C) 6.8
(D) 0.625

Correct Answer: B

Explanation:

17 ÷ 25 = 0.68

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Question (16)

QN0026581

Which rational number is the greatest?

(A) –5/6
(B) –1/2
(C) –3/4
(D) –7/8

Correct Answer: B

Explanation:

Among negative numbers, the one closer to zero is greater.

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Question (17)

QN0026582

Evaluate: (–7/9) × (18/14)

(A) –1
(B) 1
(C) –2
(D) 2

Correct Answer: A

Explanation:

(–7 × 18)/(9 × 14) = –126/126 = –1

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Question (18)

QN0026583

Which of the following decimals terminates?

(A) 0.232323…
(B) 0.999…
(C) 0.875
(D) 0.454545…

Correct Answer: C

Explanation:

It ends after finite digits.

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Question (19)

QN0026584

Which irrational number is approximately equal to 1.414?

(A) √2
(B) √3
(C) √5
(D) √7

Correct Answer: A

Explanation:

√2 ≈ 1.414

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Question (20)

QN0026585

A repeating decimal always represents:

(A) An irrational number
(B) A rational number
(C) A whole number only
(D) A negative number only

Correct Answer: B

Explanation:

Every recurring decimal can be written as p/q.

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Question (11)

Evaluate: 7/12 + 5/18

Explanation:

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Question (12)

Which decimal represents a rational number?

Explanation:

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Question (13)

The additive identity for rational numbers is:

Explanation:

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Question (14)

Which of the following is irrational?

Explanation:

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Question (15)

Convert 17/25 into decimal form.

Explanation:

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Question (16)

Which rational number is the greatest?

Explanation:

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Question (17)

Evaluate: (–7/9) × (18/14)

Explanation:

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Question (18)

Which of the following decimals terminates?

Explanation:

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Question (19)

Which irrational number is approximately equal to 1.414?

Explanation:

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Question (20)

A repeating decimal always represents:

Explanation:

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