Which of the following are sets ? Justify your answer.
A team of eleven best-cricket batsmen of the world.
Which of the following are examples of the null set
$\{ x:x$ is a natural numbers, $x\, < \,5$ and $x\, > \,7\} $
Write the following sets in the set-builder form :
$\{ 2,4,6 \ldots \} $
Which of the following sets are finite or infinite.
The set of months of a year
Write the following sets in the set-builder form :
${\rm{\{ 5,25,125,625\} }}$