SOLUTION: Can someone help me on this problem? I need to find the GCF of 6, 18 and 30. Thank you.

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Question 53309: Can someone help me on this problem?
I need to find the GCF of 6, 18 and 30.
Thank you.
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
6 is the biggest number that divides evenly into all three numbers.
6/6=1
18/6=3
30/6=5
Another way to do it is to find the one number that is a factor in all three numbers:
6=6*1
18=6*3
30=6*5
Another way is to find the prime factors using a factor tree:
6=2*3
18=2*3*3
30=2*3*5
They all have 2*3 in common. 2*3=6