$A = \{ x:x \ne x\} $ represents

Write the following sets in the set-builder form :

${\rm{\{ 2,4,8,16,32\} }}$

What universal set $(s)$ would you propose for each of the following :

The set of isosceles triangles

Write the following sets in roster form :

$D = \{ x:x$ is a prime number which is divisor of $60\} $

Let $A=\{a, e, i, o, u\}$ and $B=\{a, b, c, d\} .$ Is $A$ a subset of $B ?$ No. (Why?). Is $B$ a subset of $A ?$ No. (Why?)

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 $“\mathrm{LOYAL}”.$