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3*4 = 12
3*11 = 33
so 3 is a factor of both 12 and 33. That is 3 is a common factor.
No number larger than 3 is a factor of BOTH the numbers so 3 is the greatest common factor.
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∙ 11y agoThis answer is:
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Wiki User
∙ 8y agoBecause 3 is the largest positive integer that divides evenly into both 12 and 33 with no remainder.
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