Write the following as intervals :

 $\{ x:x \in R, - 4\, < \,x\, \le \,6\} $

Which of the following sets are finite or infinite.

$\{1,2,3 \ldots .\}$

Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:

$\{ x:x$ is a triangle in a plane $\}  \ldots \{ x:x$ is a rectangle in the plane $\} $

Let $S=\{1,2,3, \ldots, 40)$ and let $A$ be a subset of $S$ such that no two elements in $A$ have their sum divisible by 5 . What is the maximum number of elements possible in $A$ ?

Write the following intervals in set-builder form :

$\left[ {6,12} \right]$

Let $S = \{ 0,\,1,\,5,\,4,\,7\} $. Then the total number of subsets of $S$ is