Write the following sets in the set-builder form :
${\rm{\{ 2,4,8,16,32\} }}$
State whether each of the following set is finite or infinite :
The set of lines which are parallel to the $x\,-$ axis
Which of the following are sets ? Justify your answer.
The collection of all boys in your class.
If $Q = \left\{ {x:x = {1 \over y},\,{\rm{where \,\,}}y \in N} \right\}$, then
Write the following intervals in set-builder form :
$\left[ {6,12} \right]$