9th Class Math Chapter 3 Online Quiz Test

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📝 Quick MCQs Quiz – Chapter 3: Sets and Functions

12 questions • Instant result with explanations • Test your concepts!

1. A well-defined collection of distinct objects is called:

a) Relation
b) Set
c) Function
d) Group

2. The set with no elements is called:

a) Singleton set
b) Empty set / Null set
c) Infinite set
d) Universal set

3. If A = {1, 2, 3} and B = {1, 2, 3}, then A and B are:

a) Equivalent sets
b) Equal sets
c) Subsets
d) Disjoint sets

4. The union of sets A and B is denoted by:

a) A ∩ B
b) A ∪ B
c) A – B
d) A × B

5. If A = {x | x is a vowel in English alphabet}, then n(A) = ?

a) 5
b) 21
c) 26
d) 0

6. A set A is a subset of B if:

a) Every element of A is also in B
b) A and B are equal
c) A has more elements than B
d) A and B are disjoint

7. The set of all possible outputs of a function is called:

a) Domain
b) Codomain
c) Range
d) Image set

8. A function f: A → B is one-one if:

a) Different elements have different images
b) Every element in B has a pre-image
c) Range = Codomain
d) Domain = Codomain

9. If f(x) = 2x + 3, then f(5) = ?

a) 13
b) 10
c) 8
d) 11

10. The set A ∪ A’ (complement) is always equal to:

a) Empty set
b) Universal set
c) Set A
d) Set A’

11. If n(A) = 5 and n(B) = 7 and A ∩ B = ∅, then n(A ∪ B) = ?

a) 12
b) 2
c) 35
d) 0

12. A function is onto if:

a) Range = Codomain
b) Domain = Codomain
c) Every element has unique image
d) It is one-one