Write the following sets in roster form :
$D = \{ x:x$ is a prime number which is divisor of $60\} $
Write the following intervals in set-builder form :
$\left[ {6,12} \right]$
If $A$ and $B$ are any two non empty sets and $A$ is proper subset of $B$. If $n(A) = 4$, then minimum possible value of $n(A \Delta B)$ is (where $\Delta$ denotes symmetric difference of set $A$ and set $B$)
Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:
$\{ 2,3,4\} \ldots \{ 1,2,3,4,5\} $
Write the following intervals in set-builder form :
$\left( {6,12} \right]$