下面是g友參加的2011年5月27日北美gre考試機(jī)經(jīng)的部分內(nèi)容回憶,希望他的分享能給其他準(zhǔn)備參加海外gre考試機(jī)經(jīng)的人有所幫助。
作文
ISSUE
7. "The video camera provides such an accurate and convincing record of contemporary life that it has become a more important form of documentation than written records."
218. "In order for any work of art—whether film, literature, sculpture, or a song—to have merit, it must be understandable to most people."
ARGUMENT
35. The following appeared in the summary of a study on headaches suffered by the residents of Mentia. “Salicylates are members of the same chemical family as aspirin, a medicine used to treat headaches. Although many foods are naturally rich in salicylates, for the past several decades food-processing companies have also been adding salicylates to foods as preservatives. This rise in the commercial use of salicylates has been found to correlate with a steady decline in the average number of headaches reported by participants in our twenty-year study. Recently, food-processing companies have found that salicylates can also be used as flavor additives for foods. With this new use for salicylates, we can expect a continued steady decline in the number of headaches suffered by the average citizen of Mentia."
數(shù)學(xué)
A if the quantity in Column A is greater;
B if the quantity in Column B is greater;
C if the two quantities are equal;
D if the relationship cannot be determined from the information given.
1.X = 4 + c ,y = 4x + C,X和Y的算術(shù)平均數(shù)是17,問C和3比大小,選B
2.a1, a2, a3, a4, …, an 給a1 = 1 , a(n+1) = - an 問 a14和a20的大小,選C
3. 一個(gè) set S,包含n個(gè)連續(xù)正整數(shù),比較大小:the range of the set 和 n,選B。
4. (1/3+1/2)2和(1/3)2+(1/2)2比大小,選A
5.等腰梯形求面積;斜邊為10,上邊15,下邊25,周長60,比較他的面積和一個(gè)數(shù),選C6.一個(gè)數(shù)軸,A點(diǎn)坐標(biāo)是X,B點(diǎn)坐標(biāo)是Y,y在-1~0之間,A到B的距離是y2,問X與0的大小,選B7.27被一個(gè)數(shù)除之后余3,問這個(gè)數(shù)與6比較大小,選D8.15/4<K<41/2,問范圍內(nèi)的偶數(shù)和奇數(shù)比大小,選A9.5t=1/125,t和-3比較。選C10. 兩個(gè)圓的圓心分別是O和P,圓1以O(shè)為圓心并且過點(diǎn)P,圓2以P為圓心并且在O點(diǎn)之外,對比圓O和圓P的半徑大小,選A
圖表題,柱狀圖:103位學(xué)生的成績分布圖,題目給出該半級的平均分?jǐn)?shù)(區(qū)間0~10分)好像是6.72,然後標(biāo)準(zhǔn)差2.83
問:1.median是多少?2.多少%的學(xué)生的標(biāo)準(zhǔn)差剛好是1?
答:1. 直接找圖中第52名學(xué)生在那根柱子上。我圖上的是選7;2. 選項(xiàng)有A. 15% B.40% 然后是更大的一些 因?yàn)槠骄鶖?shù)是小數(shù),而圖表中的給的得分均是整數(shù),所以我先算不在1以內(nèi)的百分?jǐn)?shù)標(biāo)準(zhǔn)差應(yīng)該是一組數(shù)中每個(gè)數(shù)相對平均數(shù)的偏離程度 也就是偏離6.75為1.0的學(xué)生的分?jǐn)?shù),把那些得分的所有學(xué)生人數(shù)加起來是85個(gè)人,85/103比85%小一點(diǎn),則1減去它比15%大一點(diǎn),算到A
題目:不是灰色部分的長方形(就是白色區(qū)域的長方形)的長比寬多1inch,整個(gè)大長方形的面積是42 square inch問:灰色部分的面積:
答:因?yàn)閮?nèi)部長方形的長比寬多1inch,陰影部分寬度均為1inch,所以外部長方形的長也比寬多1inch,而大長方形面積為42。則設(shè)長為X,寬為X-1, 則X*(X-1)=42, X=7, 內(nèi)部長方形的面積為(X-2)*(X-3)=20 square inch陰影部分的面積為,42-20=22 square inch
題目: BAC=X°,BAD=Y°,求用X表示Y。答案是180減去X。
題目:一個(gè)餅圖,金融背景=17%,銷售=30%,管理=%(忘記了),問銷售比金融多少百分?jǐn)?shù)比是:75%。Made decision的人金融背景60%,問其他的背景能夠做Made decision的比例是多少。8%(這里有個(gè)總?cè)藬?shù)1900,直接忽略,另兩數(shù)相乘即可)
應(yīng)用題
1.數(shù)列a1=0, An=1/2An-1 +4 , 估計(jì)a100 的大小 選項(xiàng)A. 8 下面幾項(xiàng)都比8大,選A。
2. 問:一個(gè)房子的售價(jià)是77000元比原本列出的價(jià)錢少30% 問當(dāng)房子價(jià)錢是121000比原來的定價(jià)高出多少%
答:77000/ 70% = 110000(原價(jià)) 121000-110000/110000 = 10% 選 10% greater
3.問:一群數(shù)字的平均是 m ,最大的數(shù)字比m大20 ,最小的數(shù)字比m小4 求range?答:24
4.一個(gè)數(shù)和4的PRODUCT 跟這個(gè)數(shù)和4的SUM相等? 答:4*x=x+4,X=4/3
5. If(a¥b)=2a+2b (x¥y)¥W=? 答:A=2x+2y,答案為2A+2W。
6.一個(gè)人說他的crew(似乎)如果天氣良好和其他因素好的話,可以10天蓋一層樓(level)結(jié)果花了85天蓋了7層,其中天氣影響延期的80percentage 問其他因素影響多少天。 KEY: 3days