The number of proper subsets of the set $\{1, 2, 3\}$ is
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $2x - 1 = 0\} $
Write the following sets in roster form :
$C = \{ x:x{\rm{ }}$ is a two-digit natural number such that sum of its digits is $8\} $
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 sets in roster form :
$A = \{ x:x$ is an integer and $ - 3 < x < 7\} $