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Question (11)

QN0030423

Which of the following expressions has the value 0?

(A) (–15) + 15
(B) (–15) – 15
(C) 15 + 15
(D) (–15) + (–15)

Correct Answer: A

Explanation:

An integer and its additive inverse always add up to 0.

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Question (12)

QN0030424

Evaluate (–9) × (–5) – 17.

(A) 28
(B) –28
(C) 62
(D) –62

Correct Answer: A

Explanation:

(–9) × (–5) = 45 and 45 – 17 = 28.

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Question (13)

QN0030425

Which of the following statements is correct?

(A) Multiplying any integer by 0 gives 1.
(B) Multiplying any integer by 0 gives 0.
(C) Dividing any integer by 0 gives 0.
(D) Adding 0 changes the value of the integer.

Correct Answer: B

Explanation:

Zero is the multiplicative identity for producing a product of zero.

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Question (14)

QN0030426

Find the value of (–42) ÷ 6 + 11.

(A) 4
(B) –4
(C) 18
(D) –18

Correct Answer: A

Explanation:

(–42) ÷ 6 = –7 and –7 + 11 = 4.

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Question (15)

QN0030427

A magic grid has a magic sum of –5. Two numbers in a column are 6 and –8. The third number is

(A) –2
(B) –3
(C) –4
(D) –5

Correct Answer: B

Explanation:

6 + (–8) = –2. Therefore, the missing number is –3.

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Question (16)

QN0030428

Evaluate 18 – [ (–4) × 3 ].

(A) 6
(B) 30
(C) –30
(D) –6

Correct Answer: B

Explanation:

(–4) × 3 = –12 and 18 – (–12) = 30.

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Question (17)

QN0030429

Which of the following products is positive?

(A) (–13) × 5
(B) 13 × (–5)
(C) (–13) × (–5)
(D) (–1) × 13

Correct Answer: C

Explanation:

The product of two negative integers is positive.

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Question (18)

QN0030430

Evaluate (–30) + 18 + (–9).

(A) –21
(B) –3
(C) 3
(D) 21

Correct Answer: A

Explanation:

(–30) + 18 = –12 and –12 + (–9) = –21.

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Question (19)

QN0030431

A lift starts at the ground floor (0), goes down 12 floors and then comes up 17 floors. At which floor does it stop?

(A) –5
(B) 5
(C) 17
(D) –17

Correct Answer: B

Explanation:

0 – 12 + 17 = 5.

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Question (20)

QN0030432

Evaluate [24 ÷ (–6)] + [(–7) × (–2)].

(A) 10
(B) 18
(C) –18
(D) –10

Correct Answer: A

Explanation:

24 ÷ (–6) = –4, (–7) × (–2) = 14 and –4 + 14 = 10.

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Question (11)

Which of the following expressions has the value 0?

Explanation:

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Question (12)

Evaluate (–9) × (–5) – 17.

Explanation:

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Question (13)

Which of the following statements is correct?

Explanation:

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Question (14)

Find the value of (–42) ÷ 6 + 11.

Explanation:

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Question (15)

A magic grid has a magic sum of –5. Two numbers in a column are 6 and –8. The third number is

Explanation:

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Question (16)

Evaluate 18 – [ (–4) × 3 ].

Explanation:

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Question (17)

Which of the following products is positive?

Explanation:

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Question (18)

Evaluate (–30) + 18 + (–9).

Explanation:

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Question (19)

A lift starts at the ground floor (0), goes down 12 floors and then comes up 17 floors. At which floor does it stop?

Explanation:

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Question (20)

Evaluate [24 ÷ (–6)] + [(–7) × (–2)].

Explanation:

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