Write down all the subsets of the following sets
$\emptyset $
What universal set $(s)$ would you propose for each of the following :
The set of right triangles
State whether each of the following set is finite or infinite :
The set of circles passing through the origin $(0,0)$
Let $A=\{1,2,3,4,5,6\} .$ Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces:
$ 8\, .......\, A $
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is odd $\} $