返回题库

甲板卡片

Deck the Cards

专题
Probability / 概率
难度
L6

题目详情

解析

本月的谜题是一个密码——红牌(按顺序)映射到 字母 A-M,黑卡为 N-Z。卡片上写着“还有多少张已满” 在这副牌中发现的房子多于顺子吗?”回头看甲板,19,420 可以组成葫芦,并且可以组成 12,228 顺子(包括 A 高) 和 A 低顺子)。因此,我们要寻找的答案是 7,192。

恭喜本月随机选出的 Jane Street T 恤获胜者 Jacob 希尔顿!


Original Explanation

This month’s puzzle was a cryptogram — the red cards (in order) map to the letters A-M, and the black cards to N-Z. The cards read “How many more full houses than straights are found in this deck?” Looking back at the deck, 19,420 full houses can be made, and 12,228 straights can be made (including ace-high and ace-low straights). So, the answer we were looking for was 7,192.

Congrats to this month’s randomly-chosen winner of a Jane Street t-shirt, Jacob Hilton!