Least Common Multiple
NumbersLeast Common Multiple
20and12\displaystyle {20}{\quad\text{and}\quad}{12}  
8and1\displaystyle {8}{\quad\text{and}\quad}{1}  
4and15\displaystyle {4}{\quad\text{and}\quad}{15}  
6and9\displaystyle {6}{\quad\text{and}\quad}{9}