The Greatest Common Factor is the highest number that will exactly divide into two or more numbers.
A set of numbers whose GCF is one are called co-prime or relatively prime
The GCF of 6 and 10 is 2.
20 and 100.GCF is 20, and LCM is 100.
16,24
4 and 9 have a GCF of 1
The pair of numbers whose GCF is 1 and LCM is 36 is 9 and 4. The numbers should be greater than their GCF and less than their LCM.
12 and 66
15 and 30
10,20
21 and 42.
30 and 60
6and 9