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The factors of 28 are:

1, 2, 4, 7, 14, 28

The factors of 76 are:

1, 2, 4, 19, 38, 76

The common factors are:

1, 2, 4

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7y ago
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6y ago

It is: 2

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Q: What is the greastest common fator shared by 78 and 28?
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The GCF of 7 and 28 is 7.


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What is the greatest common factor of 12 28 and 40?

The greatest common factor of 12, 28, and 40 is 4 To find the greatest common factor of numbers, you first need to split these numbers into their prime factors: 12 = 2x2x3 28 = 2x2x7 40 = 2x2x2x2x5 You then need to find which prime factors are shared between the numbers. In this case, each of the numbers uses two 2s, but no other numbers are common between them. So to find the GCF we simply multiply two 2s: 2x2=4 Thus the GCF of 12, 28 and 40 is 4.