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The greatest common factor of 42 and 78 is 6

Express each number in terms of its prime factors.

78 = 2 x 3 x 13

42 = 2 x 3 x 7

The common factors are 2 and 3 therefore the GCF = 2 x 3 = 6

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GCF(42, 78) = 6.

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7y ago
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Q: What is the greatest common factor of 42 and 78?
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