Write the following intervals in set-builder form :

$\left[ {6,12} \right]$

Given the sets $A=\{1,3,5\}, B=\{2,4,6\}$ and $C=\{0,2,4,6,8\},$ which of the following may be considered as universal set $(s)$ for all the three sets $A$, $B$ and $C$

$\{ 1,2,3,4,5,6,7,8\} $

State which of the following sets are finite or infinite :

$\{ x:x \in N$ and $(x - 1)(x - 2) = 0\} $

Write the following sets in the set-builder form :

$\{ 1,4,9 \ldots 100\} $

Write the set $A = \{ 1,4,9,16,25, \ldots .\} $ in set-builder form.

Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?

$\{ 3,4\}  \in A$