Let $S=\{1,2,3,4\}$. The total number of unordered pairs of disjoint subsets of $S$ is equal to

Which of the following are examples of the null set

Set of even prime numbers

Write the following intervals in set-builder form :

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

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

$1 \subset A$

Write the following sets in roster form :

$D = \{ x:x$ is a prime number which is divisor of $60\} $

Which set is the subset of all given sets