来源:GMAT考试 发布时间:2013-01-07 GMAT考试辅导视频 评论
In the figure above, what is the ratio
(1) The perimeter of rectangle KLMN is 30 meters.
(2) The three small rectangles have the same dimensions.是指面积相同,但同时也是指长宽都相同
【答案】B
77. 9031-!-item-!-187;#058&006222
At a dinner party, 5 people are to be seated around a circular table. Two seating arrangements are considered different only when the positions of the people are different relative to each other. What is the total number of different possible seating arrangements for the group?
(A) 5
(B) 10
(C) 24
(D) 32
(E) 120
【答案】C
【思路】
若為一直線排法 為5!
但此題目為圓形
五個人排圈圈...
ABCDE
BCDEA
CDEAB
DEABC
EABCD
都是一樣故排圈圈時就是5!/5=4!
除以五是為了消除每次相鄰位置改變時都會有重複的情況
98. 10689-!-item-!-187;#058&007329
If x is a negative integer, which of the following expressions has the LEAST value?
【答案】D
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