MCQ Questions | Class 8 Maths Chapter 12 | Exponents and Powers with Answers

MCQ | Exponents and Powers Class 8

Check the below NCERT MCQ Questions for Class 8 Maths Chapter 12 Exponents and Powers with Answers Pdf free download. MCQ Questions for Class 8 Maths with Answers were prepared based on the latest exam pattern. We have Provided Exponents and Powers Class 8 Maths MCQs Questions with Answers to help students understand the concept very well.

Objective Question | NCERT Maths Class 8

NCERT Solutions Class 8 Maths
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	8th
Subject:	Maths
Chapter:	12 Part-3
Chapters Name:	Exponents and Powers
Medium:	English

Ncert Solutions for Class 8 Maths | Objective Type Questions

You can refer to NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Exponents and Powers | Class 8 Maths | NCERT Solutions

Q1.	CBSE Class 8 Maths Mcq Questions The value of 2^-2 is:
	A. 4
	B. ¼
	C. 2
	D. ½

Ans: ¼
Hint:
2^-2 = 1/2² = ¼

Q2.	CBSE Class 8 Maths Exponents and Powers Mcq Questions The multiplicative inverse of 7^-2is:
	A. 7²
	B. 7
	C. 1/7²
	D. 1/7

Ans: 7²
Hint:
The multiplicative inverse of any value is the one which when multiplied by the original value gives a value equal to 1.
7^-2 = 1/7²
Hence, 7² x 1/7² = 1

Q3.	Class 8 Maths Mcq Chapter 12 2² x 2³ x 2⁴ is equal to:
	A. 2²⁴
	B. 2^-5
	C. 2⁹
	D. 2^-9

Ans: 2⁹
Hint:
By laws of exponents:
a^m x aⁿ = a^m+n
2² x 2³ x 2⁴ = 2²⁺³⁺⁴ = 2⁹

Q4.	Class 8 Maths Mcq online test 3^-2 x 3^-5 is equal to:
	A. 3^-7
	B. 3^-3
	C. 3^-10
	D. 3⁷

Ans: 3^-7
Hint:
3^-2 x 3^-5= (1/3²) x (1/3⁵)
= (1/3²⁺⁵)
= (1/3⁷)
= 3^-7

Q5.	Class 8 Maths Mcq with answers 5⁴/5² is equal to:
	A. 5⁶
	B. 5^-6
	C. 5^-2
	D. 5²

Ans: 5²
Hint:
By exponent law:
a^m/aⁿ = a^m-n
5⁴/5² = 5^4-2 = 5²

Q6.	Learn Cbse Class 8 Maths Mcq The value of (3⁴)³ is:
	A. 3
	B. 3¹²
	C. 3⁷
	D. None of the above

Ans: 3¹²
Hint:
By law of exponent:
(a^m)ⁿ = a^mn
(3⁴)³ = 3^4×3 = 3¹²

Q7.	Mcq Class 8 Maths Chapter 12 3² x 4² is equal to:
	A. 121
	B. 49
	C. 144
	D. 156

Ans: 144
Hint:
By exponent law;
a^m x b^m = (ab)^m
3² x 4² = (3×4)² = 12² = 144

Q8.	Mcq for Class 8 Maths Chapter 12 5⁷/6⁷ will give the value:
	A. (5/6)⁷
	B. (5/6)⁰
	C. (5/6)^-7
	D. (6/5)^-7

Ans: (5/6)⁷
Hint:
By exponent law:
a^m/b^m = (a/b)^m
5⁷/6⁷ = (⅚)⁷

Q9.	Mcq Questions for Class 8 Maths with answers pdf Chapter 12 100⁰+20⁰+5⁰ is equal to
	A. 125
	B. 25
	C. 1/125
	D. 3

Ans: 3
Hint:
By exponent law we know:
a⁰ = 1
100⁰ + 20⁰ + 5⁰ = 1 + 1 + 1 = 3

Q10.	Mcq Questions for Class 8 Maths with answers pdf download If (–3)^m+1 × (-3)⁵ = (-3)⁷, then the value of m is:
	A. 5
	B. 7
	C. 1
	D. 3

Ans: 1
Explanation: (-3)^m+1 × (-3)⁵ = (-3)⁷
(-3)^m+1+5 = (-3)⁷
(-3)^m+6 = (-3)⁷
Since, base are equal on both the sides, hence if we compare the powers,
m + 6 = 7
m = 7 – 6 = 1