Question

If $P=$ {factors of 36} and $Q=$ {factors of 48}, find $Q-P$

Answer 1

Factors of $36$ are $1,2,3,4,6,9,12,18,36$
Factors of $48$ are $1,2,3,4,6,8,12,16,24,48$
So, P $=\{1,2,3,4,6,9,12,18,36\}$
And Q $=\{1,2,3,4,6,8,12,16,24,48\}$
$Q-P$ will have the elements of $Q$ which are not in $PB$
So, $Q-P=\{8,16,24,48\}$.