Class 7 Mathematics

Chapter 13: Exponents and Powers

Q1. Which of the following is written in exponential form?

A. 3 + 3 + 3
B. 3 × 3 × 3
C. 3 − 3 − 3
D. 3 ÷ 3

Correct Answer: B

Explanation:
Repeated multiplication is written using exponents. 3 × 3 × 3 = 3³.

Q2. In the expression 5³, what is the base?

A. 3
B. 5
C. 15
D. 125

Correct Answer: B

Explanation:
The base is the number which is multiplied repeatedly. In 5³, base = 5.

Q3. What is the value of 2⁴?

A. 8
B. 12
C. 16
D. 24

Correct Answer: C

Explanation:
2⁴ = 2 × 2 × 2 × 2 = 16.

Q4. Using laws of exponents, simplify: 3² × 3⁴

A. 3⁶
B. 3⁸
C. 6⁶
D. 9⁶

Correct Answer: A

Explanation:
a^m × aⁿ = a^m+n
So, 3² × 3⁴ = 3⁶.

Q5. What is the value of 9⁰?

A. 0
B. 1
C. 9
D. Cannot be found

Correct Answer: B

Explanation:
Any number raised to the power 0 is equal to 1.

Q6. Simplify: 10⁵ ÷ 10²

A. 10³
B. 10⁷
C. 10¹⁰
D. 10²

Correct Answer: A

Explanation:
a^m ÷ aⁿ = a^m−n
10⁵⁻² = 10³.

Q7. Which of the following represents 1,000,000?

A. 10³
B. 10⁴
C. 10⁵
D. 10⁶

Correct Answer: D

Explanation:
10⁶ = 1,000,000.

Shaktimatha CBSE Learning
Class 7 Mathematics – Chapter 13
MCQs with Explanations