SOLUTION: Are 153 and 42 relatively prime? If not, what common factor do both numbers share?

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Question 1096996: Are 153 and 42 relatively prime? If not, what common factor do both numbers share?
Found 2 solutions by Alan3354, greenestamps:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Are 153 and 42 relatively prime? If not, what common factor do both numbers share?
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Factor the 2 numbers, then you'll know.

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!

Pick the number that is "easier" and find its prime factorization. Then see if any of those prime factors divide into the other number evenly.