[計量] CAT test6

看板GRE (GRE入學考試)作者 (sqaure)時間16年前 (2009/11/07 15:48), 編輯推噓1(102)
留言3則, 2人參與, 最新討論串1/2 (看更多)
11.What is the difference between the sum of the first 2003 positive even integers and the sum of the first 2003 positive odd integers? ans : 2003 26.Of the families in City X in 1994, 40 percent owned a personal computer. The number of families in City X owning a computer in 1998 was 30 percent greater than it was in 1994, and the total number of families in City X was 4 percent greater in 1998 than it was in 1994. What percent of the families in City X owned a personal computer in 1998? ans: 50% -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.122.174.40

11/07 16:09, , 1F
11. 因為兩兩差1,2003個就差2003 (1,2)(3,4)(5,6)
11/07 16:09, 1F

11/07 20:41, , 2F
為何不是2002(pair)+2003(最後一個) = 4005?
11/07 20:41, 2F

11/07 20:47, , 3F
sorry 我了解了,是前2003個,而不是"2003"
11/07 20:47, 3F
文章代碼(AID): #1AzIOmmE (GRE)
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文章代碼(AID): #1AzIOmmE (GRE)