Question

Write all the factors of $36$ which are not the factors of $12$

Answer 1

Factors of $12=\{1,2,3,4,6,12\}$

Factors of $36=\{1,2,3,4,6,9,12,18,36\}$

Factors of $36$ which are not the factors of $12$

$=\{9,18,36\}$