[tex]Identify \ common \ factor : \\\\36 = \ \boxed{2} \cdot2 \cdot\boxed{3} \cdot \boxed{3}\\\\54= \boxed{2}\cdot \boxed{3}\cdot\boxed{3} \cdot 3\\\\108= \boxed{2}\cdot 2 \cdot \boxed{3} \cdot \boxed{3} \cdot 3\\\\Multiply \ the \ common \ factor : \ 2 \cdot 3 \cdot 3=18 \\ \\ Answer: \ The \ GCF \ of \ 36 \ and \ 54 \ and \ 108 \ is \ 18 . [/tex]
