Elements of Sets Worksheets


Related Topics & Worksheets:
Sets
Math Worksheets




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Objective:

  • I know whether an element is a member of a set.
  • How many elements in a given set?
     

Examples:
∈ denotes “is an element of’ or “is a member of” or “belongs to”.
∉ denotes “is not an element of” or “is not a member of” or “does not belong to”
 
For the set A = {1, 3, 5}
a) 1 ∈ A
b) 2 ∉ A
 
If A is the set of positive integers less than 12 then
the number of elements is set A is 11
If Q is the set of letters in the word ‘HELLO’ then
the numbers of elements in Q is 4.
 

Check out the following lessons on sets if you need help.
Set Notations
Finite & Infinite sets
Empty Set
 

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. State whether each of the following statements is true (T) or false (F).

a) 60° ∈ { x : x is an acute angle}

b) 3124 ∈ { x : x is a multiple of 3}

c) 5 ∉ { x : x is an even number}

d) 2.62 ∈ { x : x is an integer}

e) –213 ∉ {x : x is an integer}

f) 5 ∈ {x : x is a prime number, x < 10}

2. Give the number of elements in each of the following sets.

a) Q is the set of vowels

b) R = {x : x is an integer, 21 ≤ x ≤ 30}

c) S is the set of months with 31 days

d) T = {x : x is a factor of 100}

e) U is the set of letters in the word “GOOGLE”

f) G = {Ø}

g) H = {0}

h) I = Ø

i) J = { null }

j) A is the set of odd numbers between 18 and 30.




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