To find the Greatest Common Factor of these numbers, write down their
factors 24=2 times 2 times 2 times 3 30=2 times 3 times 5 42=2 times 3 times 7<span> </span>
find the numbers common to all of them and group likewise 24=(2 times 3) times 2 times 2 30=(2 times 3) times 5 42=(2 times 3) times 7 the common one among all of them is 2 times 3=6 <span> </span>
the GCF=6
