Which of the following are sets ? Justify your answer.
The collection of ten most talented writers of India.
The collection of ten most talented writer of India is not a well-defined collection because the criteria for determining a writer's talent vary from person to person.
Hence, this collection is not a set.
Write the following intervals in set-builder form :
$\left[ { - 23,5} \right)$
Write down all the subsets of the following sets
$\emptyset $
Write the set $\left\{\frac{1}{2}, \frac{2}{3}, \frac{3}{4}, \frac{4}{5}, \frac{5}{6}, \frac{6}{7}\right\}$ in the set-builder form.
Which of the following are sets ? Justify your answer.
The collection of all natural numbers less than $100 .$
Write the following sets in the set-builder form :
${\rm{\{ 5,25,125,625\} }}$