Examine whether the following statements are true or false :
$\{ a,b\} \not\subset \{ b,c,a\} $
Write the following intervals in set-builder form :
$\left[ { - 23,5} \right)$
Which of the following is a true statement
Write the solution set of the equation ${x^2} + x - 2 = 0$ in roster form.
Let $A=\{1,2,3,4,5,6\} .$ Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces:
$10 \, .........\, A $