State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is prime $\} $
Which of the following is the empty set
Two finite sets have $m$ and $n$ elements. The total number of subsets of the first set is $56$ more than the total number of subsets of the second set. The values of $m$ and $n$ are
Write the set $\{ x:x$ is a positive integer and ${x^2} < 40\} $ in the roster form.
Examine whether the following statements are true or false :
$\{ a\} \in \{ a,b,c\} $