Answer:
Step-by-step explanation:
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
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
the GCF=6
