If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∩ B?

Find n(A) when A = {14, 16, 18, 20, 22, 24}.

Which of following are the possible subsets of

U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}?

Which is NOT an element of the set of countries in Southeast Asia?

If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∩ B?

If $A=\left\{1,2,3,4,5,6\right\}$  , and $B=\left\{2,3,6\right\}$  .

The proposition  $3\notin A$  is:

If $A=\left\{1,2,3,4,5,6\right\}$  , and $B=\left\{2,3,6\right\}$  .

The proposition  $5\in A$  is:

If $A=\left\{1,2,3,4,5,6\right\}$  , and $B=\left\{2,3,6\right\}$  .

The proposition  $B\subset A$  is:

What's the difference between $A\subseteq B$  and  $A\subset B$  ?