Question

Find the greatest common factor of 18 ,12 and 42 .

Answer 1

The Factors of the numbers are as follows;

$\begin{gathered} 18=2\times3\times3 \\ 12=2\times2\times3 \\ 42=2\times3\times7 \end{gathered}$

The common factors are 2 and 3.

Therefore, the Greatest Common Factor is (2 x 3) 6