题目网址: www.puzzleup.com/2011/puzzle/?219 加分时限: 7/28(四) 7PM - 8/02(二) 7PM 答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。 比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分　 　 另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分） 　　 ◆Students Each of the students in a group, writes down his or her name, surname, age and birthplace on a card he or she holds. Then, these cards (each containing four entries) are collected and examined. The following observations are made: ‧ No matter which four cards are picked, at least two of them contains an identical entry. ‧ There are at most three people in the group having the same name. (ie. There may be 3 people named A, 3 people named B but there cannot be 4 people named C). ‧ There are at most three people in the group having the same surname. ‧ There are at most three people in the group having the same age. ‧ There are at most three people in the group having the same birthplace. What is the possible maximum number of students in this group? 每个学生手上有一张卡片，上面写着各自的名字、姓氏、年龄、出生地４个项目， 收集并检视所有卡片後得知: ‧任选４张卡片，至少两张卡片上有一个项目完全相同。 ‧这群学生里最多有３人有相同的名字。（意即可以有3人叫A, 3人叫B, 但不能有 4人叫C。) ‧这群学生里最多有３人有相同的姓氏。 ‧这群学生里最多有３人有相同的年龄。 ‧这群学生里最多有３人有相同的出生地。 问这群学生最多有几人？ -- 不知道这题有没有我想的那麽简单 至於02题，英文看呒... 哪位高手给翻一下please --

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