作者skiptomylou3 (一條寂寞又無助的道路)
看板GMAT
標題[計量] 兩題有關GMAT problem solving的問題
時間Tue Feb 17 18:02:41 2009
因為這兩題是從對岸的一本書叫做"GMAT 匯編"上面看到的，
所以不知道標題要寫什麼，所以如果有需要更改標題的再麻煩告知!
1.Month Average price per Dozen
April $1.26
May $1.20
June $1.08
The table above shows the average (arithmetic mean) price per dozen
of the large grade A eggs sold in a certain store during three
secessive months.If 2/3 as many dozen were sold in April as in May,
and twice as many were sold in June as in April . What was the average
price per dozen of the eggs sold over the three-month period?
(1) $1.08
(2) $1.10
(3) $1.14
(4) $1.16
(5) $1.18 Ans:D
第一題感覺應該要設x和y，但完全沒有頭緒要把x,y設在哪?
2. If y =/= 3 and 3x/y is a prime integer greater than 2, which of the
following must be true?
I. x=y
II. y=1
III. x and y are prime integers.
(A) None
(B) I only
(C) II only
(D) III only
(E) I and III Ans:A
第二題我的答案是(E)，但讓我很模糊的是甚麼叫做prime integer?
用google查prime integer得到"素數"，然後用wiki查感覺更不清楚
麻煩大家了~謝謝!
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◆ From: 118.167.184.214
1F：推 hitachil:prime integer是質數吧? 02/17 19:05
2F：→ Bballer:樓上正姐 02/17 19:16
3F：→ jamlco:原Po OG做完了嗎 做完應該知道是質數>< 02/17 19:54
修個文，我補來欣，然後來欣要這裡拜或下禮拜才發，但我想早點開始動作
所以就先開始算! 抱歉!問這麼白癡的問題
※ 編輯: skiptomylou3 來自: 118.167.184.214 (02/17 20:04)
※ 編輯: skiptomylou3 來自: 118.167.184.214 (02/17 20:05)