同学们对扑克牌都不陌生吧,可是,对于扑克牌中蕴涵的数学知识,你们知道吗?小明是个特爱钻研的同学,遇到什么奇怪的事情总想弄清楚前因后果.有一天,小明放学回家,爸爸对小明说:“小明,来,我给你变个魔术.”小明说:“好啊.”于是,他就放下书包,来到爸爸的身边.爸爸从一副扑克牌里面拿出了黑桃A、2、3、4、5、6、7、8、9、10、J、Q、K共13张牌,然后,把它们的顺序打乱.他把扑克牌正面展开让小明看了一下,这时,扑克牌变成了7、A、Q、2、 Students are not familiar with playing cards right, but for the mathematical knowledge contained in playing cards, do you know? Xiao Ming is a special love studying, what strange things always want to find out the cause and effect.One day, Xiao Ming school Go home, my father said to Xiao Ming: “Xiao Ming, come, I will give you a magic. ” Xiao Ming said: “good. ” So he dropped the bag, came to my father’s side. The card contains 13 cards of spades A, 2,3,4,5,6,7,8,9,10, J, Q, K and then disrupts their order. Let the front of the card expand to see Xiaoming, then, playing cards into a 7, A, Q, 2,