Find the intersection of each pair of sets :
$X=\{1,3,5\} Y=\{1,2,3\}$
$\{ 1,3\} $
$X \cap Y=\{1,3\}$
If $A=\{3,5,7,9,11\}, B=\{7,9,11,13\}, C=\{11,13,15\}$ and $D=\{15,17\} ;$ find
$A \cap C \cap D$
If $A$ and $B$ are disjoint, then $n(A \cup B)$ is equal to
Let $A=\{2,4,6,8\}$ and $B=\{6,8,10,12\} .$ Find $A \cup B$
If $A=\{3,6,9,12,15,18,21\}, B=\{4,8,12,16,20\},$ $C=\{2,4,6,8,10,12,14,16\}, D=\{5,10,15,20\} ;$ find
$A-B$
$D-B$
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