CBSE Class 8 Mathematics by Pavan | Practice Test to Test Your Knowledge
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CBSE Class 8 Mathematics

CBSE Class 8 Mathematics

Thorough mock test covering Number Systems, Algebra, and Geometry. Includes both objective and subjective questions with step-by-step problem-solving techniques.

2025-07-16
Pavan Pavan
CBSE Mathematics Class 8 Grade 8

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

What is a rational number?

A
A number that can be written as a fraction of two integers
B
A number that is only positive
C
A number that can be represented as a decimal
D
A number that cannot be expressed as a fraction

Which of the following properties holds for rational numbers under addition?

A
Closure
B
Commutativity
C
Associativity
D
All of the above

What is the multiplicative identity for rational numbers?

A
0
B
1
C
-1
D
2

Which operation is not closed for whole numbers?

A
Addition
B
Multiplication
C
Subtraction
D
Division

Which property is not applicable to subtraction for rational numbers?

A
Commutativity
B
Associativity
C
Distributivity
D
All of the above

What happens when you add 0 to a rational number?

A
The number becomes zero
B
The number remains unchanged
C
The number becomes negative
D
The number is ignored

Which operation is not commutative for rational numbers?

A
Addition
B
Multiplication
C
Subtraction
D
Division

What is the result of dividing a rational number by zero?

A
The result is zero
B
The result is undefined
C
The result is infinite
D
The result is the reciprocal

Which of the following is a property of rational numbers under multiplication?

A
Commutativity
B
Associativity
C
Distributivity
D
All of the above

Which of the following is true for rational numbers?

A
Between any two rational numbers, there are infinitely many other rational numbers
B
Rational numbers cannot be represented as decimals
C
Rational numbers are always integers
D
Rational numbers do not include negative numbers

What is the result of multiplying a rational number by 1?

A
The result is 0
B
The result is 1
C
The result is the same rational number
D
The result is negative

Which of the following is not true about the rational number 0?

A
It is the additive identity for rational numbers
B
It is the multiplicative identity for rational numbers
C
It is the identity for addition in rational numbers
D
It is the number added to a rational number to keep it unchanged

What property allows the computation of the following: (a + b) + c = a + (b + c)?

A
Commutativity
B
Associativity
C
Closure
D
Distributivity

Which operation is distributive over addition for rational numbers?

A
Subtraction
B
Addition
C
Multiplication
D
Division

Which of the following rational numbers is not closed under division?

A
Whole numbers
B
Integers
C
Natural numbers
D
Rational numbers

What is the result of multiplying two rational numbers?

A
It may or may not be a rational number
B
It is always an integer
C
It is always a rational number
D
It is always a whole number

Which of the following statements is true for rational numbers?

A
Rational numbers cannot have negative values
B
Rational numbers are always integers
C
Any rational number can be written as a fraction
D
Rational numbers can only be whole numbers

What is the sum of two rational numbers?

A
It may or may not be a rational number
B
It is always a whole number
C
It is always a rational number
D
It is always an integer

Which of the following is not a property of rational numbers?

A
Commutativity under addition
B
Associativity under multiplication
C
Closure under division
D
Distributivity over addition

Which operation is distributive over subtraction for rational numbers?

A
Addition
B
Multiplication
C
Division
D
Subtraction

What is the result of dividing two rational numbers?

A
It may or may not be a rational number
B
It is always a rational number
C
It is always an integer
D
It is always a whole number

Which property of rational numbers ensures that a + 0 = a?

A
Multiplicative identity
B
Additive identity
C
Commutative property
D
Distributive property

What is the result of subtracting two rational numbers?

A
It may or may not be a rational number
B
It is always a rational number
C
It is always a whole number
D
It is always an integer

Which of the following properties is not satisfied by rational numbers?

A
Commutativity under multiplication
B
Distributivity over addition
C
Associativity under division
D
Closure under subtraction

What is the product of two rational numbers?

A
It may or may not be a rational number
B
It is always an integer
C
It is always a rational number
D
It is always a whole number

Which property is demonstrated by a × (b × c) = (a × b) × c?

A
Commutativity
B
Associativity
C
Distributivity
D
Closure

What is the inverse of the rational number 2/3?

A
3/2
B
2/3
C
-2/3
D
1/2

Which is the result of multiplying two rational numbers, 3/4 × 5/7?

A
15/28
B
12/35
C
1/2
D
20/28

Which of the following sets is closed under subtraction?

A
Natural numbers
B
Whole numbers
C
Integers
D
Rational numbers

Which of the following sets is not closed under division?

A
Rational numbers
B
Integers
C
Whole numbers
D
Natural numbers