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【OG20-P174-178题】
Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?
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这个数是23
这个数除以4余3,除以5余3,所以必定为4X5+3=23,所以有3个6人桌,一个5人桌
题目讨论 (3条评论)

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244581ucnoy
题目都没有读懂。。。摘自网络解析:问题在问10
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0 回复 2022-08-30 16:52:07
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331637w
求助怎么就是20a+3了
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0 回复 2020-11-13 08:05:32
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TOBEAWESOME回复331637w
这是同余定理的应用。一个口诀:和同加和,余同加余,差同减差。余同加余的意思是,如果一个数X除以a余c,除以b也余c(即余数相同),那么X可以写成X=d*n+c的形式,其中d是a和b的最小公倍数。
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0 回复 2020-12-16 16:31:52
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默默
4*5+3=23
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0 回复 2018-04-21 00:19:47
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默默回复默默
3是他们的余数,所以要相加
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0 回复 2018-04-21 00:20:10
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Caseykkkkk回复默默
总人数是20a+3 为什么一定是23呢
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0 回复 2018-06-16 18:27:59
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Caseykkkkk回复默默
知道了 不能超过40人
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0 回复 2018-06-16 18:28:58
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