Which of the following are examples of the null set
Set of even prime numbers
A set of even prime numbers is not a null set because $2$ is an even prime number.
Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$\{1,2,3\}\subset A$
Write the following intervals in set-builder form :
$\left[ {6,12} \right]$
The number of proper subsets of the set $\{1, 2, 3\}$ is
Examine whether the following statements are true or false :
$\{ a,b\} \not\subset \{ b,c,a\} $
Which of the following is a true statement
