If the common factor of all even numbers is () a △ B = 10 (a, B is not equal to the natural number of 0), then the maximum of a, B is The common factor of all even numbers is () A △ B = 10 (natural number a and B are not equal to 0), then the greatest common factor of a and B is ()

If the common factor of all even numbers is () a △ B = 10 (a, B is not equal to the natural number of 0), then the maximum of a, B is The common factor of all even numbers is () A △ B = 10 (natural number a and B are not equal to 0), then the greatest common factor of a and B is ()

The common factor of all even numbers is 2
a. The greatest common factor of B is B