Sets

Set Symbols

100

Name the symbols below

 ∈ AND ∉ 

'element of' AND 'not an element of'

200

Name the symbols below

 ∪  AND ∩ 

Union AND Intersection

300

Name the symbol below

 Ø 

Empty Set

400

Name the symbols below

  A' 

A Complement

500

Name the set symbol below

 #(A) 

'the number of element in set A..."

Cardinality

100

What is #(A)? 

If A ={square, triangle, circle, pentagon}

#(A) = 4

200

What is #(G)? 

If G = {Even numbers 1-11)

#(G) = 5

300

What is #(T)? 

If T = {days of the week}

#(T) = 7

400

What is #(U)? 

If U = {vowels}

#(U) = 5

500

What is #(R)? 

If R = {Square numbers from 1 to 20 inclusive}

#(R) = 4 {1,4,9,16}

Describe/List Sets

100

List the elements A= {Even numbers between 1 and 11}

A = {2,4,6,8,10}

200

Describe the following 

B = {3, 6, 9, 12, 15}

B= {multiples of 3 up to 5}

300

Describe the set below 

C= {Saturday, Sunday}

C={Weekend days} or {Days beginning with 'S'}

400

Describe the set below fully 

R={1,2,3,4,5,6,7,8,9,10}

R = {numbers from 1-10 inclusive}

500

Describe the following

W ={2, 3, 5, 7, 11, 13, 17, 19}

W = {prime numbers between 1 and 20}

Union/Intersection

100

A = {1, 2, 3, 4}

B = {2, 3, 5, 7}

What is A ∪ B

A ∪ B = {1,2,3,4,5,7}

200

F= {15, 16, 17}

W = {12, 15, 18}

What is F  ∩ W?

F  ∩ W = {15}

300

F= {5, 6, 7, 9}

W = {1, 2, 3, 4}

What is F ∪ W?

F ∪ W = {1, 2, 3, 4, 5, 6, 7, 9}

400

Z = {14, 18}

C = {15, 19}

What is Z ∩ C?

Z ∩ C =  Ø

500

True or False?

{1,2,6,8} ∩ {3,4,5,9} =  Ø

True!