《猜生日和猜牌》 猜生日和猜牌 幾年前,有一道猜生日的邏輯推理題(見「A Math Problem From Singapore Goes Viral: When Is Cheryl’s Birthday?」,Kenneth Chang April 14, 2015),筆者翻出來放在這裡讓感興趣的朋友再回顧一下。 Continue reading “《猜生日和猜牌》”