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Find the greatest common factor (GCF) of 64 and 72.A. 8B. 9C. 4D. 12

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Okay, here we have this:

Let's decompose each number and then we see their common factors:

64=2*2*2*2*2*2

72=2*2*2*3*3

The factors common to both are: 2*2*2, and by multiplying we obtain that the greatest common divisor is 8. The correct answer is option A.

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