# What is the least common multiple of 9, 36 and 45?

$9 = {3}^{2}$
$36 = {2}^{2} \cdot {3}^{2}$
$45 = {3}^{2} \cdot 5$
The LCM is ${2}^{2} \cdot {3}^{2} \cdot 5 = 180$