Enter GCF or LCM numbers:
Determine GCF(15,45)
GCF = Largest factor that divides numbers
Determine the factors for 15
1,3,5,15
Determine the factors for 45
1,3,5,9,15
List the common factors
1,3,5,15
GCF(15,45) = 15
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
