If $A = \{ 1,\,2,\,3,\,4,\,5\} ,$ then the number of proper subsets of $A$ is
Which of the following are examples of the null set
Set of odd natural numbers divisible by $2$
Write the following sets in the set-builder form :
${\rm{\{ 2,4,8,16,32\} }}$
List all the elements of the following sers :
$E = \{ x:x$ is a month of a year not having $ 31 $ days ${\rm{ }}\} $
Write the following intervals in set-builder form :
$\left[ { - 23,5} \right)$