Bests & Worsts Reviews from Amazon

I guess I should have read the reviews of these cards more carefully. While they are somewhat sturdy cards, as many others have mentioned the set is incomplete. As you can see from the picture I've attached for 4's facts there is no card for 4x0, 4x3, 4x5, 4x12. Now to be completely honest there are cards for 0x4, 3x4, 5x4, and 12x4, and I would expect my son to know that these are the same, however I'd like both cards to be included. I am very unhappy with set and I would definitely recommend looking elsewhere.