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

The set of numbers which are multiple of $5$

The number of elements in the set $\{x \in R :(|x|-3)|x+4|=6\}$ is equal to

Write down all the subsets of the following sets

$\{ 1,2,3\} $

List all the elements of the following sers :

$A = \{ x:x$ is an odd natural number $\} $

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

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

Write the following as intervals :

$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $