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## Exponents and Powers Class 8 MCQs Questions with Answers

Students are advised to solve the Exponents and Powers Multiple Choice Questions of Class 8 Maths to know different concepts. Practicing the MCQ Questions on Exponents and Powers Class 8 with answers will boost your confidence thereby helping you score well in the exam.

Explore numerous MCQ Questions of Exponents and Powers Class 8 with answers provided with detailed solutions by looking below.

Question 1.

The value of 7^{2} is

(a) 7

(b) 49

(c) 2

(d) 14

## Answer

Answer: (b) 49

Question 2.

16 is the multiplicative inverse of

(a) 2^{-4}

(b) 2^{8}

(c) 8^{2}

(d) 2^{4}

## Answer

Answer: (a) 2^{-4}

Question 3.

In 10^{2} the base is

(a) 1

(b) 0

(c) 10

(d) 100

## Answer

Answer: (c) 10

Question 4.

Charge of an electron is 0.000,000,000,000,000,000,16 coulomb and in exponential form it can be written as

(a) 16 × 10^{-18} coulomb

(b) 1.6 × 10^{-21} coulomb

(c) 1.6 × 10^{-19} coulomb

(d) 16 × 10^{-21} coulomb

## Answer

Answer: (c) 1.6 × 10^{-19} coulomb

Question 5.

Evaluate the exponential expression (−n)^{4}× (−n)^{2}, for n = 5.

(a) 25

(b) 15625

(c) 3125

(d) 625

## Answer

Answer: (b) 15625

Question 6.

Value of (3^{0} + 2^{0}) × 5^{0} is

(a) 1

(b) 25

(c) 2

(d) 0

## Answer

Answer: (c) 2

Question 7.

When we have to add numbers in standard form, we convert them into numbers with the ________ exponents.

(a) same

(b) different

(c) not equal

(d) None of these

## Answer

Answer: (a) same

Question 8.

Fill in the blank a^{m} × a^{n} = a …….. where m and n are natural numbers:-

(a) mn

(b) m + n

(c) m – n

(d) \(\frac { m }{ n }\)

## Answer

Answer: (b) m + n

Question 9.

Very small numbers can be expressed in standard form using __________ exponents.

(a) equal

(b) negative

(c) positive

(d) none of these

## Answer

Answer: (b) negative

Question 10.

Multiplicative inverse of 7^{-2} is _________

(a) 49

(b) 5

(c) 7

(d) -14

## Answer

Answer: (a) 49

Question 11.

The value of 1000^{0} is

(a) 0

(b) 1000

(c) 1

(d) None of these

## Answer

Answer: (c) 1

Question 12.

The standard form of 9030000000 is given by

(a) 9.03 × 10^{9}

(b) 90.3 × 10^{7}

(c) 903 × 10^{6}

(d) 9.03 × 10^{-9}

## Answer

Answer: (a) 9.03 × 10^{9}

Question 13.

The multiplicative inverse of 2^{-3} is

(a) 2

(b) 3

(c) 3

(d) 2^{3}

## Answer

Answer: (d) 2^{3}

Question 14.

Find the value of the expression a^{2} for a = 10.

(a) 100

(b) 1

(c) 10

(d) None of these

## Answer

Answer: (a) 100

Question 15.

Evaluate exponential expression − 2^{5}.

(a) 15

(b) -32

(c) 16

(d) none of these

## Answer

Answer: (b) -32

Question 16.

In exponential form 149,600,000,000 m is given by :

(a) 1.496 × 10^{11} m

(b) 1.496 × 10^{8} m

(c) 14.96 × 10^{8} m

(d) 14.96 × 10^{11} m

## Answer

Answer: (a) 1.496 × 10^{11} m

Question 17.

The value of 3^{0} is ________.

(a) 0

(b) 3

(c) 1

(d) None of these

## Answer

Answer: (c) 1

Question 18.

The value of (\(\frac { 1 }{ 3 }\))^{-2} is equal to

(a) 9

(b) 1

(c) -6

(d) 1/3

## Answer

Answer: (a) 9

Question 19.

The Base in the expression 10^{24} is __________.

(a) 1

(b) 10

(c) 0

(d) 24

## Answer

Answer: (b) 10

Question 20.

(a^{m})^{n} is equal to

(a) a^{m+n}

(b) a^{m-n}

(c) a^{mn}

(d) a^{n-m}

## Answer

Answer: (c) a^{mn}

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