The common factors are: 1, 2, 7, 14
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The greatest common factor is 14
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70
The LCM of 30, 42, and 70 is 210
The common factors are: 1, 2, 7, 14The Greatest Common Factor = 14
43 is a prime number so the common factors of 43 and 42 are 1