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Answer
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9

↓Steps Explained:↓

Determine GCF(9,9)

GCF = Largest factor that divides numbers

Determine the factors for 9

1,3,9

Determine the factors for 9

1,3,9

List the common factors

1,3,9

GCF(9,9) = 9

Evaluate GCF

Since GCF ≠ 1, they are not relatively prime (co-prime)

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


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