Xiao Su and Xiaohua have 39 cards to play the card game. Xiao Su must take some cards first.

Are you asking how many cards Xiao Su must win? Three cards.

After consulting the mathematical algorithm, I know that * * * has 39 cards, and if Xiaoming takes six cards from the penultimate card, then Xiaoming can get the last card no matter how many cards Liang Xiao takes, so Xiaoming only needs to take enough cards for the first time to make the remaining cards a multiple of 6, that is, take three cards.

Games are the first step for all mammals, especially primates, to learn and survive.