Write the following sets in the set-builder form :

${\rm{\{ 2,4,8,16,32\} }}$

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

$\varnothing \subset A$

Write the following sets in roster form :

$A = \{ x:x$ is an integer and $ – 3 < x < 7\} $

List all the subsets of the set $\{-1,0,1\}.$

Which of the following are sets ? Justify your answer.

The collection of all even integers.