Enter GCF or LCM numbers:

Number 1Number 2(Optional) Enter Number 3
            

Determine GCF(9,10)

GCF = Largest factor that divides numbers

Determine the factors for 9

1,3,9

Determine the factors for 10

1,2,5

List the common factors

1


GCF(9,10) = 1

GCF(9,10) = 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