Question

Class 7 Maths MCQ Questions for Exponents and Powers with Answers?

Answer 1

Class 7 Maths MCQ Questions for Exponents and Powers with Answers accessible here. The MCQ Questions for Class 7 Exponents and Powers with answers have been prepared as per the latest syllabus, NCERT books and exam pattern suggested by CBSE in class 7. Multiple Choice Questions are an important part of exams for class 7 Exponents and Powers and if practiced properly can help you to get higher marks. Class 7 Exponents and Powers students should refer to the following multiple-choice questions with answers for Exponents and Powers. These MCQ questions for class 7 Maths with answers will come in exams and help you to score good marks.

Students are advised to solve Exponents and Powers Multiple Choice Questions of Class 7 Maths to know different concepts. Practicing the MCQ Questions on Exponents and Powers Class 7 with answers will boost your confidence thereby helping you score well in the exam.

Practice MCQ Questions for Class 7 Maths

1. The exponential form of 10000 is

(a) 10³
(b) 10⁴
(c) 10⁵
(d) none of these

2. The exponential form of 100000 is

(a) 10³
(b) 10⁴
(c) 10⁵
(d) none of these

3. The exponential form of 81 is

(a) 3⁴
(b) 3³
(c) 3²
(d) none of these

4. The exponential form of 125 is

(a) 5⁴
(b) 5³
(c) 5²
(d) none of these

5. The exponential form of 32 is

(a) 2³
(b) 2⁴
(c) 2⁵
(d) none of these

6. The exponential form of 64 is

(a) 2⁵
(b) 2⁶
(c) 2⁷
(d) 2⁸

7. The value of (- 2)3 is

(a) 8
(b) -8
(c) 16
(d) -16

8. The value of (- 2)⁴ is

(a) 8
(b) -8
(c) 16
(d) -16

9. If 2³ × 2⁴ = 2?, then ? =

(a) 3
(b) 4
(c) 1
(d) 7

10. If (- 3)⁴ × (-3)⁶ = (-3)?, then ? =

(a) 4
(b) -3¹⁰
(c) -3⁶
(d) -3¹²

11. 2⁷ ÷ 2³ =

(a) 2⁴
(b) 2¹⁰
(d) 2
(d) 1/2

12. 10⁶ ÷ 10⁵ =

(a) 10¹
(b) 10⁵
(c) 10⁶
(d) 10¹¹

13. (-5)⁴ =

(a) 125
(b) 625
(c) 375
(d) 125

14. (2²)³ =

(a) 2²
(b) 2³
(c) 2¹
(d) 2⁶

15. (5²)¹⁰ =

(a) 52
(b) 5²⁰
(c) 5¹⁰
(d) 5⁵

16. 3⁰ × 4⁰ × 5⁰ =

(a) 1
(b) 3
(c) 4
(d) 5

17. (2⁰ + 3⁰ ) × 4⁰ =

(a) 1
(b) 2
(c) 3
(d) 4

18. Which of the following is true?

(a) 2⁰ = (100)⁰
(b) 10² × 10⁸ = 10¹⁶
(c) 2² × 3³ = 65
(d) 2³ > 3²

19. (2² × 2)² =

(a) 2³
(b) 2⁴
(c) 2⁵
(d) 2⁶

20. \(\frac{3^8}{3^5\times3^3}=\)

(a) 1
(b) 3
(c) 5
(d) 8

21. \((\frac{a^4}{a^2}\times a^3 =)\)

(a) a⁴
(b) a⁵
(c) a⁶
(d) a⁸

22. The value of (−1)⁴⁷ is

(a) -1
(b) 1
(c) 0
(d) None of these

23. The multiplicative inverse of −7 is _____

(a) 7
(b) 1/7
(c) -7
(d) -1/7

24. The number which is multiplied by (−8)−1 to obtain a product equal to 10 ⁻¹
is _ .

(a) \(-\frac{4}{5}\)
(b) \(-\frac{3}{5}\)
(c) \(-\frac{1}{5}\)
(d) \(-\frac{5}{4}\)

25. The multiplicative inverse of 1/5 is

(a) 7
(b) 5
(c) 6
(d) 9

Answer 2

1. Answer: (b) 10⁴

Explanation: 10000 = 10 × 10 × 10 × 10 

= 10⁴

2. Answer: (c) 10⁵

Explanation: 100000 = 10 × 10 × 10 × 10 × 10 

= 10⁵

3. Answer: (a) 3⁴

Explanation:  81 = 3 × 3 × 3 × 3 

= 3⁴

4. Answer: (b) 5³

Explanation: 125 = 5 × 5 × 5 

= 5³

5. Answer: (c) 2⁵

Explanation: 32 = 2 × 2 × 2 × 2 × 2 

= 2⁵

6. Answer: (a) 2⁶

Explanation: 64 = 2 × 2 × 2 × 2 × 2 × 2 

= 2⁶

7. Answer: (b) -8

Explanation: (-2)³ = (-2) × (-2) × (-2) 

= -8

8. Answer: (c) 16

Explanation: (-2)⁴ = (-2) × (-2) × (-2) × (-2) 

= 16

9. Answer: (d) 7

Explanation: 2³ × 2⁴ = 2³⁺⁴ 

= 2⁷

10. Answer: (b) -3¹⁰

Explanation:  (-3)⁴ × (-3)⁶ = (-3)⁴⁺⁶ 

= (-3)¹⁰

11. Answer: (a) 2⁴

Explanation:  2⁷÷ 2³ = 2^7-3

 = 2⁴

12.  Answer: (a) 10¹

Explanation: 10⁶ ÷ 10⁵ = 10^6-5 

= 10¹

13. Answer: (b) 625

Explanation: (-5)⁴ = (-5) × (-5) × (-5) × (-5) 

= 625

14. Answer: (d) 2⁶

Explanation:  (2²)³ = 2^2×3 

= 2⁶

15. Answer: (b) 5²⁰

Explanation:  (5²)¹⁰ = 5^2×10 

= 5²⁰

16. Answer: (a) 1

Explanation:  3⁰ × 4⁰ × 5⁰ 

= 1 × 1 × 1 

= 1

17. Answer: (b) 2

Explanation: (2⁰ + 3⁰) × 4⁰ = (1 + 1) × 1 

= 2

18. Answer: (a) 2⁰ = (100)⁰

Explanation:  2⁰ = (100)⁰ 

= 1

19. Answer: (d) 2⁶

Explanation: (2² × 2)² = (2²⁺¹)² 

= (2³)² 

= 2^3×2

= 2⁶

20. Answer: (a) 1

Explanation:  \(\frac{3^8}{3^5\times3^3}\)

\(=\frac{3^8}{3^{5+3}}\)

\(=\frac{3^8}{3^8}\)

= 1

21. Answer: (b) a⁵

Explanation:  \((\frac{a^4}{a^2})\times a^3\)

\(=a^{4-2}\times a^3\)

\(=a^2\times a^3\)

\(=a^{2+3}\)

\(=a^5\)

22. Answer: (b) 1

Explanation: (−1)⁴⁷

= 1.

23. Answer: (d) -1/7

Explanation:  Multiplicative inverse means the same thing as reciprocal.

And the product of a number and its multiplicative inverse is 1. So , \(-7\times\frac{-1}{7}\) = 1

Hence multiplicative inverse of -7 is  -1/7

24. Answer:  (a) \(-\frac{4}{5}\)

Explanation:  Let the number be x

Then (-8)^-1 × x = (10)^-1

\((\frac{-1}{8})\times x=\frac{1}{10}\)

\(x=\frac{-4}{5}\)

25. Answer: (b) 5

Explanation: Let x be the multiplicative inverse

Therefore,

\(\frac{1}{5}\times x=1\)

 \(x=\frac{1}{\frac{1}{5}}\)

x = 5

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