GWD两道数学题，请教亲爱的们~

ambertun

 

r	s	t
u	v	w
x	y	z

 

Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column.  What is the value of r?

(1)     v + z = 6

(2)     s + t + u + x = 6

这道题的第一项咋硬是没有求出来呢

Q7:

For a certain race, 3 teams were allowed to enter 3 members each.  A team earned 6 – n points whenever one of its members finished in nth place, where 1 ≤ n ≤ 5.  There were no ties, disqualifications, or
                withdrawals.  If no team earned more than 6 points, what is the least possible score a team could have earned?

 

A.     0

B.     1

C.     2

D.     3

E.      4

Answer:

这道题主要是没有读明白怎么个规则，请教大家，谢谢啦

jikuren

1，D
(1)V+Z=6, which means v=3 and z=3, otherwise v+z can't equal to 6.  Thus r can only be 3. 

wentaow2008

 第一题我也选D  第二题的话，先把1，2，3，4，5加起来，这就是3各队一共的总分（3个前提条件已给），又说每个队不超过6，那么就让两个队6分（其实就是一个队的两个队员分别拿到1，5分，另一个不拿分；另一个队的两个队员拿到2，4分），另一个不拿分，因此，剩下的3分就是一个队可得到的最低分，其实就是这个队的一个对员拿了3分，其两个都在比赛的五名之后，不拿分。所以选D.

ambertun

谢谢楼上的同志们，虽然第二道还是没明白规则，主要题目没怎么理解哈，我再想想。

ambertun

第二道题也理解了，谢谢噶

zysuper

题目中不是说no tie ,then how can the two teams both get 6 scores?

hungen518

No tie means that each member,not each team, had his only(the Nth) place. Then, A team earned 6 – n points whenever one of its members finished in nth place.

[此贴子已经被作者于2009-1-30 21:02:26编辑过]