State whether each of the following set is finite or infinite :
The set of numbers which are multiple of $5$
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is odd $\} $
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 $B$)
Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$\{1,2,3\}\subset A$
Write the following intervals in set-builder form :
$\left[ {6,12} \right]$