What is the greatest common factor 10 and 20 have in common?

Answer: GCF=10

Step-by-step explanation:

1. To solve this problem you must apply the proccedure shown below:

- First, you must find the prime factorization of 10 and 20, as following:

10=2*5

20=2*2*5=2²*5

- Finally, you must write the prime factors common to 20 and 10 and mutpliy them.

- Therefore, you have that the greatest common factor (GCF) of 10 and 20 have in common is:

GCF=2*5=10