Which of the following pairs of sets are equal ? Justify your answer.
$\mathrm{X} ,$ the set of letters in $“\mathrm{ALLOY}"$ and $\mathrm{B} ,$ the set of letters in $“\mathrm{LOYAL}”.$
Examine whether the following statements are true or false :
$\{a\} \subset\{a, b, c\}$
Write the solution set of the equation ${x^2} + x - 2 = 0$ in roster form.
Write the following sets in the set-builder form :
${\rm{\{ 5,25,125,625\} }}$
Which of the following are sets ? Justify your answer.
The collection of all boys in your class.