Assume that a four of a kind is defined as only needing to match the numeric (or letter?) value or in other words that suits do not matter.
In that case, like Sp said. And the number of decks does not matter.
well this is embarrassing but for some reason i am getting a higher number, what am i missing?
Do your decks have Jokers? (Wouldn't matter, anyway, since Joker helps making 4 of a kind.) I assume, standard deck is 52 cards 2 - 10, J, Q, K, A.Spoiler for
If the above assumptions are correct, but the answer is still wrong, I give up and would like to see a list of more cards than Sp posted not having at least 1 four of a kind.