What's the Lowest Common Multiple (LCM) of $12$ and $15$?

Least common multiple $\mathbf{\left(}\mathbf{LCM}\mathbf{\right)}$.

$\mathrm{LCM}$ is the smallest number that is common in all the given numbers multiples.

Multiples of the given numbers $12$ and $15$ are,

Multiples of $12$$=12,24,36,48,\mathbf{60},72,84,96,108,120$

Multiples of $15$$=15,30,45,\mathbf{}\mathbf{60},75,90,105,120,135,150$

It is observed that, $60$ is the smallest number that is common in all the given numbers multiples.

Hence, the $\mathrm{LCM}$ of $12$ and $15$ is $60$.