Write the following sets in roster form :

$A = \{ x:x$ is an integer and $ - 3 < x < 7\} $

Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?

$\{ \{ 3,4\} \}  \subset A$

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 sets in roster form :

$\mathrm{E} =$ The set of all letters in the world $\mathrm{TRIGONOMETRY}$

Write the following intervals in set-builder form :

$\left( { - 3,0} \right)$

Write the following sets in the set-builder form :

${\rm{\{ 5,25,125,625\} }}$