1楼哈哈爸
(在这里随手写下你现在的心情)
发表于 2009-5-1 18:17
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哪位朋友能帮忙解题呵，谢谢啦。
Five classes A, B, C, D and E took part in an international chess competition.
Each class sent in 2 participants.
The rules of the competition were :
(a) Participants do not compete with each other for more than 1 game,
(b) Participants from the same class cannot compete with each other.
After a few rounds of competitions, it turned out that all had completed different number of games, except for a participant from class A.
How many games had the 2 participants from class A completed?.
