Question

What is the largest number that is a factor of both 20 and 30?

Answer 1

I believe the correct answer is 10.

Factors of 20: 1, 2, 4, 5, 10, 20

Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

10 is the GCF.

Answer 2

10 would be the greatest common factor of these two numbers.

Hope this helps!