Question

Common factors of $9$ and $36$ are:

• A. $1,3,9$
• B. $1,4,3,5,9$
• C. $1,4,5$
• D. None of the above

Answer 1

The correct option is A $1,3,9$

Factors of $9$ are $1,3,9$
Factors of $36$ are $1,3,4,6,9,12,36$
$\therefore$ common factors are $1,3,9$.