If $A, B$ and $C$ are any three sets,then $A - (B \cap C)$ is equal to

Consider the experiment of rolling a die. Let $A$ be the event 'getting a prime number' and $B$ be the event 'getting an odd number'. Write the set representing the event '$A$ or $B$'.

Let $A$ and $B$ be two sets in the universal set. Then $A - B$ equals

Find the union of each of the following pairs of sets:
$X = \{1, 3, 5\}, Y = \{1, 2, 3\}$

If $A=\{1, 2, 3, 4\}, B=\{3, 4, 5, 6\}, C=\{5, 6, 7, 8\}$ and $D=\{7, 8, 9, 10\}$,find $A \cup C$.

If $A, B$ and $C$ are non-empty sets,then $(A - B) \cup (B - A)$ equals: