Question

What is the hcf of 120 and 168?

Answer 1

$$\begin{gathered} 120=2\times 2\times 2\times 3\times 5 \\ 168=2\times 2\times 2\times 3\times 7 \end{gathered}$$
So H.C.F of 120 and 168 = $2\times 2\times 2\times 3=24$