The number of improper subsets of the set $\left\{1, 2, 3\right\}$ is:

Which of the following can be the universal set for the rest of the set $A=\left\{1, 2, 3, 4, 5\right\} , B=\left\{1, 2, 4, 5, 8\right\}, C=\left\{1, 2, 3, 4, 5, 6, 7, 8, 9, 10\right\} \& D=\left\{5, 7, 8, 9, 10\right\}$?

Which of the following elements belongs to set $A$, Where $A=$ set of negative integers lie between $-3 \& -8$?

If $A=$ set of first $10$ multiples of $8$, which of the following does not belong to $A$?

If $A \& B$ are equivalent sets, then which of the following is true?

Which of the following can represent $x$, if $x=\left\{odd numbers between 10 abd 18\right\}$?

If a set has $5$ elements, then which of the following is not true?

Write the following set in set-builder form.

$A=\{3,6,9,12,\dots ,63\}$

Write the following set in set-builder form.

$B=\{2,3,5,7,11,13,17,19\}$