Set Notation Symbols

Question 1

Capitol U

Answer 1

The universal set (everything in the set)

Question 2

∪

Answer 2

Union (everything in both circles)

Question 3

Small n

Answer 3

Intersection (things/numbers inbetween the two circles)

Question 4

Capitol N

Answer 4

Naturals (numbers over 0 (positive) )

Question 5

Z with a line imbetween it

Answer 5

Integers ( any numbers positive or negative )

Question 6

Capitol Q

Answer 6

Rationals ( something that can be a fraction e.g. 6/1 )

Question 7

E that kind of looks like a backwards B

Answer 7

Is an element of

Question 8

⊂

Answer 8

The symbol “⊂” means “is a proper subset of”. Example. Since all of the members of set A are members of set D, A is a subset of D.

Question 9

c crossed out

Answer 9

Not a subset of

Question 10

What is a subset

Answer 10

A set within a set
E.g.
a= 123
d= 1234
A is a subset of d because all the numbers in a are in d

Question 11

What is an element

Answer 11

Number(s) that belong in a set

Question 12

E crossed out

Answer 12

Is not an element of

Question 13

Curly brackets {} are used for

Answer 13

Listing elements in a set/subset

Question 14

#

Answer 14

The cardinal number ( the amount of elements in a set )
E.g. W#=7

Question 15

O with a cross through it

Answer 15

The null set ( no elements )

Question 16

=

Answer 16

Equal sets
E.g. if B= {123} and A= {321}
B=A