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.

Write the following as intervals :

 $\{ x:x \in R, – 4\, < \,x\, \le \,6\} $

Which of the following are sets ? Justify your answer.

The collection of all even integers.

Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:

$\{a, b, c\} \ldots\{b, c, d\}$

Which of the following sets are finite or infinite.

The set of months of a year