Write the following as intervals :

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

In the following state whether $A=B$ or not :

$A=\{a, b, c, d\} ; B=\{d, c, b, a\}$

State which of the following sets are finite or infinite :

$\{ x:x \in N$ and $(x - 1)(x - 2) = 0\} $

State whether each of the following set is finite or infinite :

The set of lines which are parallel to the $x\,-$ axis

Which of the following are examples of the null set

Set of even prime numbers

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

$\{1,2,3\}\subset A$