Question

Find the highest common factor of $36$ and $84$.

• A. $4$
• B. $6$
• C. $12$
• D. $18$

Answer 1

Answer: (C)

$12$

Prime factors of $36=2\times 2\times 3\times 3$
Prime Factors of $84=2\times 2\times 3\times 7$
$\therefore$ H.C.F. $=2\times 2\times 3=12$.