Hello there! :)
To find the G.C.F. of 4, 10 and 12, we must list all of their factors:
4: 1, 2, 4,
10: 1, 2, 5, 10
12: 1, 2, 3, 4, 6, 12
So 2 is the GCF of 4, 10 and 12.
Now for the LCM (Least Common Multiple)
4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60
10: 10, 20, 30, 40, 50, 60
12: 12, 24, 36, 48, 60
And we are done!
So 60 is the LCM of those 3 numbers.
Hope this helps!
