In the following,state whether $A=B$ or not:
$A=\{4, 8, 12, 16\}; B=\{8, 4, 16, 18\}$

In the following,state whether $A=B$ or not:
$A=\{a, b, c, d\} ; B=\{d, c, b, a\}$

If $A = \{1, 2, 3, 4, 5, 6\}$, then which of the following statements is false?

The set $\{n(n+1)(2n+1) : n \in \mathbb{Z}\}$ is a subset of:

State whether the following set is finite or infinite:
The set of numbers which are multiples of $5$.

Make correct statements by filling in the symbols $\subset$ or $\not\subset$ in the blank spaces:
${ x:x \text{ is a triangle in a plane} } \dots { x:x \text{ is a rectangle in the plane} }$