Some Athenians are mortal. Some men are mortal. All Athenians are men. Some Athenians are mortal. All men are Athenians.
Some mortals are Athenian.
P v Q Valid. Assume that you are told truthfully that the number is not even and that it is neither 1 nor 3. You reason that it must be 5. As it stands, this argument is not deductively valid, because it is missing some premises. The sun will rise in the west tomorrow.