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Class 8 Exam  >  Class 8 Tests  >  Mathematics (Maths) Class 8  >  Test: Exponents And Powers- 2 - Class 8 MCQ

Test: Exponents And Powers- 2 - Class 8 MCQ


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30 Questions MCQ Test Mathematics (Maths) Class 8 - Test: Exponents And Powers- 2

Test: Exponents And Powers- 2 for Class 8 2025 is part of Mathematics (Maths) Class 8 preparation. The Test: Exponents And Powers- 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Exponents And Powers- 2 MCQs are made for Class 8 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Exponents And Powers- 2 below.
Solutions of Test: Exponents And Powers- 2 questions in English are available as part of our Mathematics (Maths) Class 8 for Class 8 & Test: Exponents And Powers- 2 solutions in Hindi for Mathematics (Maths) Class 8 course. Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free. Attempt Test: Exponents And Powers- 2 | 40 questions in 40 minutes | Mock test for Class 8 preparation | Free important questions MCQ to study Mathematics (Maths) Class 8 for Class 8 Exam | Download free PDF with solutions
Test: Exponents And Powers- 2 - Question 1
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The value of 25 is _________.

Detailed Solution for Test: Exponents And Powers- 2 - Question 1
The value of 2 raised to power 5 is 32 because 2x2x2x2x2=32 therefore,32 is correct answer.
Test: Exponents And Powers- 2 - Question 2
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The Base in the expression 1024 is __________.

Detailed Solution for Test: Exponents And Powers- 2 - Question 2

In the expression 1024, the number 10 is the base, and 24 is the exponent or power to which the base is raised. Therefore, the correct answer is 10.

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Test: Exponents And Powers- 2 - Question 3
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The value of 30 is ________.

Detailed Solution for Test: Exponents And Powers- 2 - Question 3
- Any non-zero number raised to the power of zero equals 1.
- Therefore, 3⁰ = 1.
- This is a basic rule of exponents used in mathematics.
Test: Exponents And Powers- 2 - Question 4
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Multiplicative  inverse of 7-2 is _________ 
Detailed Solution for Test: Exponents And Powers- 2 - Question 4
The multiplicative inverse of 7-2 is calculated by taking the reciprocal, which results in 72 = 49.
Test: Exponents And Powers- 2 - Question 5
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Fill in the blank  am × an = a ........ where m and n are natural numbers:-
Detailed Solution for Test: Exponents And Powers- 2 - Question 5
When multiplying two exponents with the same base, you add the exponents: am × an = am+n. For example, a2 × a3 = a2+3 = a5. This demonstrates that the correct operation is addition of the exponents.
Test: Exponents And Powers- 2 - Question 6
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The exponential form of (1/8 )× (3)-3 is given by which of the following expression:
Detailed Solution for Test: Exponents And Powers- 2 - Question 6

 

Test: Exponents And Powers- 2 - Question 7
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The value of 1/3-2 is equal to
Detailed Solution for Test: Exponents And Powers- 2 - Question 7
To solve (1/3)-2, we use the rule that a-b = (1/a)b. Applying this, we get (1/3)-2 = 32 = 9.
Test: Exponents And Powers- 2 - Question 8
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In exponential form 149,600,000,000 m is given by :
Detailed Solution for Test: Exponents And Powers- 2 - Question 8
To express 149,600,000,000 m in exponential form: 1. Place the decimal after the first digit: 1.496. 2. Count the number of places moved (11). 3. Write as 1.496 × 1011 m. Thus, the correct answer is A.
Test: Exponents And Powers- 2 - Question 9
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In simplified form (3-1 + 4-1 + 5-1)0 is equals to
Detailed Solution for Test: Exponents And Powers- 2 - Question 9

Solution:

The expression (3-1 + 4-1 + 5-1)0 simplifies as follows:

  • Any number raised to the power of 0 equals 1, as long as the base is not zero.
  • In this case, the base is (3-1 + 4-1 + 5-1), which is a valid number.
  • Thus, the entire expression evaluates to 1.
Test: Exponents And Powers- 2 - Question 10
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The value of (2/3)-2 is
Detailed Solution for Test: Exponents And Powers- 2 - Question 10

Test: Exponents And Powers- 2 - Question 11
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In standard form 21600000 is written as
Detailed Solution for Test: Exponents And Powers- 2 - Question 11

count from rigth to left till you get last non-zero number 
like here 2 is the last non-zero number and for it we have to count 7 times
then write 2.16x 107

Test: Exponents And Powers- 2 - Question 12
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Usual form of the expression 3 X 10-5 is given by
Detailed Solution for Test: Exponents And Powers- 2 - Question 12

Since the power is negative, we move 5 place to the left including 3.So answer is 0.00003

Test: Exponents And Powers- 2 - Question 13
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1 micron is equals to  
Detailed Solution for Test: Exponents And Powers- 2 - Question 13

 

One micron, or micrometer (μm), is equal to one millionth of a meter, or 1×10⁻⁶ meters. It can also be written as 0.000001 meters. 

Test: Exponents And Powers- 2 - Question 14
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The approximate distance of moon from the earth is 384,467,000 m and in exponential form. This distance can be written as 
Detailed Solution for Test: Exponents And Powers- 2 - Question 14

Given , The distance between the moon

and the earth is 384467000 m 

384467000

= 384467000 × ( 108/108 )

= ( 384467000/108 ) × 108

= 3.84467 × 108 m

Test: Exponents And Powers- 2 - Question 15
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7 × 10-5 m is the standard form of which of the following
Detailed Solution for Test: Exponents And Powers- 2 - Question 15
To determine which option is in standard form (7 × 10-5 m), convert each to scientific notation: - A: 0.0007 = 7 × 10-4 - B: 0.000007 = 7 × 10-6 - C: 0.0000007 = 7 × 10-7 - D: 0.00007 = 7 × 10-5 Only option D matches 7 × 10-5 m, making it the correct answer.
Test: Exponents And Powers- 2 - Question 16
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The standard form of 4050000 is given by
Detailed Solution for Test: Exponents And Powers- 2 - Question 16
To express 4050000 in standard form, we move the decimal point six places to the left to obtain a number between 1 and 10, which gives us 4.05. Since we moved the decimal point six places to the left, we multiply by 106. Therefore, the standard form of 4050000 is 4.05 × 106.
Test: Exponents And Powers- 2 - Question 17
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Which one of the following is the value of 115
Detailed Solution for Test: Exponents And Powers- 2 - Question 17
The expression 115 involves raising 1 to the 15th power. Any number raised to any exponent remains unchanged if the base is 1. Therefore, 115 = 1.
Test: Exponents And Powers- 2 - Question 18
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1/125 is the multiplicative inverse of
Detailed Solution for Test: Exponents And Powers- 2 - Question 18


So it’s the multiplicative inverse of 1/125

Test: Exponents And Powers- 2 - Question 19
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16 is the multiplicative inverse of  
Detailed Solution for Test: Exponents And Powers- 2 - Question 19

Test: Exponents And Powers- 2 - Question 20
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Value of (30 + 20) × 50 is  
Detailed Solution for Test: Exponents And Powers- 2 - Question 20

Calculation:

- First, we need to solve the expression inside the parentheses: (30 + 20) x 50
(30 + 20) x 50    [ a0 = 1 ]
( 1 + 1) x 1
2 x 1 = 2

Test: Exponents And Powers- 2 - Question 21
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The value of 72 is
Detailed Solution for Test: Exponents And Powers- 2 - Question 21
To find the value of 72, we multiply 7 by itself. 7 × 7 = 49. Therefore, the correct answer is 49.
Test: Exponents And Powers- 2 - Question 22
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The Base in the expression 8100 is
Detailed Solution for Test: Exponents And Powers- 2 - Question 22

In the expression 8100, the number 8 is the base, and 100 is the exponent. Therefore, the correct answer is 8.

Test: Exponents And Powers- 2 - Question 23
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The value of 10000 is
Detailed Solution for Test: Exponents And Powers- 2 - Question 23
The expression 10000 equals 1 because any non-zero number raised to the power of zero is defined as 1 in mathematics. This rule applies consistently across all non-zero bases, ensuring the result is always 1 regardless of the exponent being zero.
Test: Exponents And Powers- 2 - Question 24
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Multiplicative inverse of 5-2 is
Detailed Solution for Test: Exponents And Powers- 2 - Question 24

 

Test: Exponents And Powers- 2 - Question 25
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Value of (23)2 is given by ...........
Detailed Solution for Test: Exponents And Powers- 2 - Question 25

The value of (23)2 is calculated as follows:

  • First, calculate (23):
    • 23 = 2 × 2 × 2 = 8
  • Next, square the result:
    • (8)2 = 8 × 8 = 64

Thus, the final result is 64.

Test: Exponents And Powers- 2 - Question 26
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The value of 82 ÷ 23 is given by........
Detailed Solution for Test: Exponents And Powers- 2 - Question 26

Test: Exponents And Powers- 2 - Question 27
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The value of 1/5-3 is equal to ............
Detailed Solution for Test: Exponents And Powers- 2 - Question 27

The solution for 1/5-3 is as follows:

  • We start with the expression 1/5-3.
  • Using the property of exponents, we know that 1/a-n = an.
  • Thus, 1/5-3 = 53.
  • Calculating 53 gives us 125.

The final answer is 125.

Test: Exponents And Powers- 2 - Question 28
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In exponential form 140,000,000,000 Kg is given by ............
Detailed Solution for Test: Exponents And Powers- 2 - Question 28
To express 140,000,000,000 kg in exponential form, we convert it to a number between 1 and 10 multiplied by a power of 10. Starting with 140,000,000,000, we move the decimal point two places to the left to get 1.4. Each place moved represents an exponent of 10. Moving the decimal two places gives us 102. Since there are nine additional zeros, we add 9 to the exponent, resulting in 1011. Thus, 140,000,000,000 kg is written as 1.4 × 1011 kg.
Test: Exponents And Powers- 2 - Question 29
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The expression, (5-1 + 7-1 + 3-1)0 is equals to 
Detailed Solution for Test: Exponents And Powers- 2 - Question 29
The expression (5-1 + 7-1 + 3-1)0 simplifies to 1 because any non-zero number raised to the power of zero is 1.
Test: Exponents And Powers- 2 - Question 30
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The value of (1/3)-2 is  
Detailed Solution for Test: Exponents And Powers- 2 - Question 30

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