1
Q
∅
A
Empty Set
2
Q
{ }
A
Empty Set
3
Q
⊄
A
NOT a subset of…
4
Q
X ⊂ Z
A
X is a subset of Z
5
Q
B ⊂ A
A
B is a subset of A
6
Q
Q ⊂ V
A
Q is a subset of V
7
Q
A ∩ B
A
INTERSECTION of A & B
8
Q
R ∩ V
A
INTERSECTION of R & V
9
Q
M ∩ N
A
INTERSECTION of M & N
10
Q
A ∪ B
A
UNION of A & B
11
Q
G ∪ H
A
UNION of G & H
12
Q
E ∪ F
A
UNION of E & F
Number Systems 101
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