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Worksheets11 Maths Sets - Ex. 1.1
Total questions: 15
Worksheet time: 8mins
A set is a:
Well-defined collection of objects
Random group of numbers
Only numbers
A list of equations
Which of the following is a well-defined set?
Set of good movies
Set of tall boys
Set of prime numbers less than 10
Set of beautiful flowers
The set of vowels in English alphabet is:
{a, b, c, d, e}
{a, e, i, o, u}
{b, d, f}
{x, y, z}
Which of the following represents a null set?
{0}
{}
{1, 2, 3}
{null}
If A = {1, 2, 3}, then the number of elements in A is:
1
2
3
4
The symbol ∈ denotes:
Belongs to
Not belongs to
Subset
Empty set
If A = {2, 4, 6}, then 4 ∈ A is:
True
False
Can't say
Undefined
If B = {1, 3, 5}, then 2 ∈ B is:
True
False
Not defined
None of these
Which of the following is roster form?
A = {x : x is a natural number < 5}
A = {1, 2, 3, 4}
A = {x ∈ N, x < 5}
A = {x | x < 5, x ∈ N}
Set-builder form of A = {2, 4, 6, 8} is:
A = {x ∈ N : x is even and ≤ 8}
A = {x : x < 10}
A = {2, 4, 6, 8, 10}
A = {x : x is odd}
Which set is infinite?
Set of days in a week
Set of letters in English
Set of natural numbers
Set of planets
The number of elements in the empty set is:
1
0
Not defined
Infinite
The empty set is denoted by:
{0}
( )
{ }
∞
If A = {a, b, c}, then a ∈ A is:
True
False
Not defined
a ⊂ A
If a set has elements repeated, it is:
Not a set
Set with duplicates
Still considered same set
Not well-defined
