Question

Find the $LCM$ of:
$4,5$ and $6$

Answer 1

Let us write the given numbers as the product of their prime factors,

$\begin{array}{c}4=2\times 2\\ 5=5\\ 6=2\times 3\end{array}$

So,

$\begin{array}{cc}LCM\left(4,5,6\right)& =2\times 2\times 3\times 5\\ & =4\times 3\times 5\\ & =12\times 5\\ & =60\end{array}$