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To find the greatest common factor (GCF) of 42, 70, and 105, we first need to find the prime factorization of each number.

42 = 2 x 3 x 7 70 = 2 x 5 x 7 105 = 3 x 5 x 7

The GCF is the product of the common prime factors raised to the lowest power they appear in all three numbers. Therefore, the GCF of 42, 70, and 105 is 7.

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The GCF is 7.

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Wiki User

12y ago
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Q: What is the greatest common factor of 42 70 and 105?
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