Enter GCF or LCM numbers:

Number 1Number 2(Optional) Enter Number 3
            

Answer
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9

↓Steps Explained:↓

Determine GCF(18,45)

GCF = Largest factor that divides numbers

Determine the factors for 18

1,2,3,6,9,18

Determine the factors for 45

1,3,5,9,15

List the common factors

1,3,9

GCF(18,45) = 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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