Question

Find the L.C.M. of $4,5,6$.

Answer 1

Find $LCM$ of $4,5,6$

here $4=2\times 2\times 1$

$5=5\times 1$

$6=3\times 2\times 1$

So, $LCM$ will be $2\times 2\times 5\times 3$

$=60$

here $60$ will be $LCM$ of $4,5,6$

or $\left|\begin{array}{cccc}2& 4& 5& 6\\ 2& 2& 5& 3\\ 3& 1& 5& 3\\ 5& 1& 5& 1\\ & 1& 1& 1\end{array}\right|\begin{array}{c}LCM=2\times 2\times 3\times 5\\ =60\end{array}$

By factorization method.