Mathematics
OpenStudy (anonymous):

Do all even numbers have 2 as a factor? explain

OpenStudy (mertsj):

Yes. That is the definition of an even number.

OpenStudy (mertsj):

Why is 3 a factor of 12? Because 3 x 4 = 12. In the same way 2 is a factor of 0 because 2 x 0 = 0

OpenStudy (anonymous):

$evenNumber=2k,\ k\in Z$