Why are all composite numbers not even?

Answer 1

Because composite number have more than two factors which may include odd and even numbers as for instance 21 is an odd numbers with more than two factors which are 1, 3, 7, 21 and that all even numbers are composite numbers with the exception of 2 which is a Prime number.

Answer 2

That isn't correct. There are composite numbers the ARE even, for example the number 4.The correct statement would be: "Not all composite numbers are even".

For example, 6 = 2 x 3 IS even; whereas 9 = 3 x 3 IS NOT even.