l GCF of 8 and 7

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Determine GCF(8,7)

GCF = Largest factor that divides numbers

Determine the factors for 8

1,2,4

Determine the factors for 7

1,7

List the common factors

1



GCF(8,7) = 1

Evaluate GCF

Since GCF = 1, they are relatively prime (co-prime)

Since GCF ≠ 1 and have a difference of two, the numbers are not twin prime

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