The HCF of 60,168 and 180 is

Prime factorization of 60,168 and180 is 

$\begin{array}{l}60=2\times 2\times 3\times 5=2^2\times 3^1\times 5\\ 168=2\times 2\times 2\times 3\times 7=2^3\times 3^1\times 7\\ 180=2\times 2\times 3\times 3\times 5=2^2\times 3^2\times 5\\ \text{HCF of 6}0,\text{168 and 18}0\text{ is\hspace{0.17em}}{2}^2\times 3^1=4\times 3=12\end{array}$