Question

Consider the sets
φ
,
A = { 1, 3 }, B = {1, 5, 9}, C = {1, 3, 5, 7, 9}.
Insert the symbol
⊂
or
⊄
between each of the following pair of sets:
(i)
φ
. . .
B (ii) A . . . B (iii) A . . . C (iv) B . . . C

Answer 1

@ruizgeorge

Answer 2

Check if any set fits in the other one:
i. \[\emptyset \subset B\]
ii. \[A notsubset B\]
iii. \[ B notsubset A \]
iv. \[ B subset C \]

Answer 3

B ⊂ C -> B is subset of C
B ⊄ A -> B is not subset of A