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Question (1)

QN0018440

Which of the following is equal to 2⁻³?

(A) 8
(B) 1/8
(C) 1/6
(D) 16

Correct Answer: B

Explanation:

2⁻³ = 1/2³ = 1/8.

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Question (2)

QN0018441

What is the value of 10⁻²?

(A) 100
(B) 0.01
(C) 0.1
(D) 1000

Correct Answer: B

Explanation:

10⁻² = 1/100 = 0.01.

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Question (3)

QN0018442

Which statement correctly defines a negative exponent?

(A) n⁻ᵃ = nᵃ
(B) n⁻ᵃ = 0
(C) n⁻ᵃ = 1/nᵃ
(D) n⁻ᵃ = a⁻ⁿ

Correct Answer: C

Explanation:

A negative exponent gives the reciprocal.

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Question (4)

QN0018443

What is the value of 5⁻¹?

(A) 5
(B) 1/5
(C) 25
(D) 1/25

Correct Answer: B

Explanation:

5⁻¹ = 1/5.

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Question (5)

QN0018444

Simplify 3⁻⁴ × 3⁷.

(A) 3¹¹
(B) 3⁻¹¹
(C) 3³
(D) 3⁻³

Correct Answer: C

Explanation:

Add exponents: −4 + 7 = 3.

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Question (6)

QN0018445

What is the value of 4⁻²?

(A) 16
(B) 1/4
(C) 1/16
(D) 8

Correct Answer: C

Explanation:

4⁻² = 1/4² = 1/16.

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Question (7)

QN0018446

Simplify 7⁻⁵ × 7².

(A) 7⁻³
(B) 7³
(C) 7⁻⁷
(D) 7⁷

Correct Answer: A

Explanation:

−5 + 2 = −3.

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Question (8)

QN0018447

Which of the following equals 10⁻⁵?

(A) 1/10000
(B) 1/100000
(C) 100000
(D) 0.001

Correct Answer: B

Explanation:

10⁻⁵ = 1/100000.

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Question (9)

QN0018448

Simplify 2⁻⁴ × 2⁷.

(A) 2⁻³
(B) 2³
(C) 2¹¹
(D) 2⁻¹¹

Correct Answer: B

Explanation:

−4 + 7 = 3.

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Question (10)

QN0018449

What is the value of (−5)⁻²?

(A) 25
(B) −25
(C) 1/25
(D) −1/25

Correct Answer: C

Explanation:

(−5)⁻² = 1/(−5)² = 1/25.

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