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Question (21)

QN009229

Evaluate: (–9) + 14 – 6

(A) –1
(B) 1
(C) –29
(D) 29

Correct Answer: B

Explanation:

–9 + 14 = 5 and 5 – 6 = –1

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Question (22)

QN009230

Which of the following is NOT an integer?

(A) –15
(B) 0
(C) 23
(D) 5/2

Correct Answer: D

Explanation:

5/2 is a fraction, not an integer.

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Question (23)

QN009231

The additive inverse of –19 is:

(A) –19
(B) 19
(C) 0
(D) 1/19

Correct Answer: B

Explanation:

Additive inverse of a number is the number with opposite sign.

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Question (24)

QN009232

A mountain climber is at 240 m above sea level and descends 325 m. His new position is:

(A) 565 m
(B) –85 m
(C) 85 m
(D) –565 m

Correct Answer: B

Explanation:

240 – 325 = –85

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Question (25)

QN009233

Evaluate: (–11) + 0

(A) 0
(B) 11
(C) –11
(D) –1

Correct Answer: C

Explanation:

Adding zero leaves the number unchanged.

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Question (26)

QN009234

Which statement correctly explains why (–4) × (–3) = 12?

(A) A debt multiplied by a fortune gives a fortune.
(B) Removing debts increases wealth.
(C) Negative numbers cannot multiply.
(D) Zero is added repeatedly.

Correct Answer: B

Explanation:

Removing negative quantities results in positive gain.

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Question (27)

QN009235

A bank account shows –₹950. After depositing ₹1200, the balance becomes:

(A) –₹250
(B) ₹250
(C) ₹2150
(D) –₹2150

Correct Answer: B

Explanation:

–950 + 1200 = 250

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Question (28)

QN009236

Evaluate: –17 + 9 – 12 + 20

(A) 0
(B) –40
(C) 40
(D) 2

Correct Answer: A

Explanation:

–17 + 9 = –8, –8 – 12 = –20, –20 + 20 = 0

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Question (29)

QN009237

Which of the following is closed under subtraction?

(A) Natural numbers
(B) Integers
(C) Prime numbers
(D) Whole numbers only

Correct Answer: B

Explanation:

Difference of two integers is always an integer.

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Question (30)

QN009238

If the temperature decreases by 3°C every hour from 5°C, what will be the temperature after 4 hours?

(A) –7°C
(B) –12°C
(C) 17°C
(D) 7°C

Correct Answer: A

Explanation:

5 – (3 × 4) = –7°C

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Question (21)

Evaluate: (–9) + 14 – 6

Explanation:

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Question (22)

Which of the following is NOT an integer?

Explanation:

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Question (23)

The additive inverse of –19 is:

Explanation:

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Question (24)

A mountain climber is at 240 m above sea level and descends 325 m. His new position is:

Explanation:

Link:

Question (25)

Evaluate: (–11) + 0

Explanation:

Link:

Question (26)

Which statement correctly explains why (–4) × (–3) = 12?

Explanation:

Link:

Question (27)

A bank account shows –₹950. After depositing ₹1200, the balance becomes:

Explanation:

Link:

Question (28)

Evaluate: –17 + 9 – 12 + 20

Explanation:

Link:

Question (29)

Which of the following is closed under subtraction?

Explanation:

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Question (30)

If the temperature decreases by 3°C every hour from 5°C, what will be the temperature after 4 hours?

Explanation:

Link:

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