Answer :
the greatest common factor is the biggest whole number that can go into both of them so
first find the factors and collect the ones common to both of them
30=2 times 3 times 5
54=2 times 3 times 3 times 3
the ones common to them both is 2 times 3 which is 6
first find the factors and collect the ones common to both of them
30=2 times 3 times 5
54=2 times 3 times 3 times 3
the ones common to them both is 2 times 3 which is 6