Determine GCF(60,75)
GCF = Largest factor that divides numbers
1,2,3,4,5,6,10,12,15,20,30,60
1,3,5,15,25
1,3,5,15
GCF(60,75) = 15
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