Question

(i) If $U=\{x:0\le x\le 10,x\in W\}$ and $A=$ $\{$$x:x$ is a multiple of $3\}$, find $A$
(ii) If $U$ is the set of natural numbers and $A$ is the set of all composite numbers, then what is $A$?

Answer 1

$U=\{0,1,2,3,4,5,6,7,8,9,10\}$

$A=\{x:xismultipleof3\}$

$A=\{0,3,6,9\}$

$\left(2\right)U=\{1,2,3,4,5,6,7,8,\mathrm{9........}\}$

$\left(A\right)=\left\{Setofallcompositenumbers\right\}$

$\left(A\right)=\{4,6,8,9,10,12,14,\mathrm{15....}\}$