國外英語考試《GMAT》試題（網(wǎng)友回憶版）三[單選題]1.Solvetheproblemandindicatethe（江南博哥）bestoftheanswerchoicesgiven.______.A.B.8C.9D.10E.參考答案：C參考解析：經(jīng)過計算可知，，故本題選C項(xiàng)。[單選題]2.Inthecircularregionshownabove,sectionsAandBrepresent3/8and5/11,respectively,oftheareaofthecircularregion.SectionCrepresentswhatfractionalpartoftheareaofthecircularregion?A.15/88B.2/11C.5/22D.45/88E.73/88參考答案：A參考解析：C所占比例=，故本題選A項(xiàng)。[單選題]3.Ifxis20percentgreaterthan88,thenx=______.A.68B.70.4C.86D.105.6E.108參考答案：D參考解析：x=88+88×20%=105.6，故本題選D項(xiàng)。[單選題]4.Afarmerwith1,350acresoflandhadplantedhisfieldswithcorn,sugarcane,andtobaccointheratioof5:3:1,respectively,buthewantedtomakemoremoney,soheshiftedtheratioto2:4:3,respectively.Howmanymoreacresoflandwereplantedwithtobaccounderthenewsystem?A.90B.150C.270D.300E.450參考答案：D參考解析：新增種植煙草的面積=，故本題選D項(xiàng)。[單選題]5.Ifathree-digitnumberisselectedatrandomfromtheintegers100to999,inclusive,whatistheprobabilitythatthefirstdigitandthelastdigitoftheintegerwillbothbeexactlytwolessthanthemiddledigit?A.1:900B.7:900C.9:1,000D.1:100E.7:100參考答案：B參考解析：100到999中首位數(shù)字=末位數(shù)字=第二位數(shù)字-2的數(shù)字有131，242，353，464，575,686，797，有7種可能，故本題選B項(xiàng)。[單選題]6.ThreedifferentlumberjackscanchopWamountofwoodin30minutes,45minutes,and50minutesaccordingtotheirdifferentlevelsofskillwiththeaxe.Howmuchwood,intermsofW,couldthetwofastestlumberjackschopin2hours?A.WB.6WC.WD.3WE.W參考答案：A參考解析：總伐木量=，故本題選A項(xiàng)。[單選題]7.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.LastyearJackiesaved5%ofherannualsalary.Thisyear,shemade10%moremoneythanlastyear,andshesaved8%ofhersalary.Theamountsavedthisyearwaswhatpercentoftheamountshesavedlastyear?A.56%B.76%C.158%D.176%E.188%參考答案：D參考解析：設(shè)Jackie去年收入為$100，則，故本題選D項(xiàng)。[單選題]8.If35percentof400is20percentofx,thenx=______.A.200B.350C.700D.900E.1,400參考答案：C參考解析：20%x=35%×400，故x=700.所以本題選C項(xiàng)。[單選題]9.Inasampleofassociatesatalawfirm,30percentaresecond-yearassociates,and60percentarenotfirst-yearassociates.Whatpercentageoftheassociatesatthelawfirmhavebeenthereformorethantwoyears?A.10B.20C.30D.40E.50參考答案：C參考解析：兩年以上的人員=1-30%-(1-60%)=30%，故本題選C項(xiàng)。[單選題]10.Acertainprosthodontistspecializesinimplantinggoldandsilverteethinhispatients’mouths.Hecharges$650foragoldtoothand$325forasilvertooth.Ifhistotalfeesforimplantinggoldandsilverteethlastweekwere$15,925intotal,andheimplantedfivemoregoldteeththansilverteeth,howmanyteethintotaldidheimplantovertheweek?A.31B.32C.33D.34E.35參考答案：A參考解析：設(shè)金牙的數(shù)量為x，銀牙的數(shù)量為y，故x=y+5，650x+325y=15925，故x=18.y=13，故本題選A項(xiàng)。[單選題]11.AdivavelcompanywantstocharteraplanetotheBahamas.Charteringtheplanecosts$8,000.Sofar,18peoplehavesignedupforthedivip.Ifthecompanycharges$300perticket,howmanymorepassengersmustsignupforthedivipbeforethecompanycanmakeanyprofitonthecharter?A.7B.9C.13D.27E.45參考答案：B參考解析：，故本題選B項(xiàng)。[單選題]12.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.Anengineerdesignedaballsothatwhenitwasdropped,itrosewitheachbounceexactlyone-halfashighasithadfallen.Theengineerdroppedtheballfroma16-meterplatformandcaughtitafterithaddivaveled46.5meters.Howmanytimesdidtheballbounce?A.5B.6C.7D.8E.9參考答案：A參考解析：從16米的平臺落下，反彈了8米，即總共走了24米；然后再從8米落下，重復(fù)這一過程，故在工程師接到球之前，球反彈了5次，所以本題應(yīng)選A項(xiàng)。[單選題]13.Theequation(R-3)/28=(S+8)/35relatesthevaluesoftwolinkedcurrencies,whereRisthevalueindollarsofonecurrencyandSisthevalueindollarsoftheothercurrency.WhichofthefollowingequationscanbeusedtoconvertdollarvaluesfromtheRcurrencytotheScurrency?A.S=(5R-47)/4B.S=(4R+47)/5C.S=(5R+17)/4D.S=(4R-17）/5E.S=5R/4-12參考答案：A參考解析：將化簡可知，故本題選A項(xiàng)。[單選題]14.Theflatdiviangularlotdepictedaboveisavailablefordevelopment.Ifx+x/2=150meters,whatistheareaofthelotinsquaremeters?A.125B.150C.1,500D.1,250√3E.2,500參考答案：D參考解析：三角形的邊長為50，50√3，100，故三角形的面積=1250√3，選擇D項(xiàng)。[單選題]15.Lastyear’sreceiptsfromthesaleofgreetingcardsduringtheweekbeforeMother’sDaytotaled$189million,whichrepresented9percentoftotalgreetingcardsalesfortheyear.Totalgreetingcardsalesfortheyeartotaledhowmanymilliondollars?A.17,010B.2,100C.1,890D.1,701E.210參考答案：B參考解析：通過計算可知，故本題選B項(xiàng)。[單選題]16.Aninvestorbought200sharesofstockinABCDcompanyin1990.By1992,theinvestmentwasworthonly2/3ofitsoriginalvalue.By1995,the200shareswereworthonly1/2oftheirvaluein1990.Bywhatpercentdidthevalueoftheinvestmentdropfrom1992to1995?A.16%B.25%C.33%D.50%E.66%參考答案：B參考解析：設(shè)200股ABCD公司的股票在1990年價值$300，則通過計算可知在1992年價值$200，1995年價值$150，故價值下降25%，本題選B項(xiàng)。[單選題]17.Whichofthefollowingcannotbethemeanoffivepositiveintegersa,b,c,dande?A.aB.d+eC.b+c+dD.(b+c+d)/3E.(a+b+c+d+e)/5參考答案：C參考解析：根據(jù)平均數(shù)的定義可知，b+c+d大于平均數(shù)，故本題選C項(xiàng)。[單選題]18.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.Whatistheperimeterofthefollowingfigureabove?(Note,figurenotnecessarilydrawntoscale.)A.155B.185C.220D.235E.250參考答案：E參考解析：將上圖分為一個直角三角形和一個長方形，如圖所示：。周長=65+40+50+30+65=250，故本題選E項(xiàng)。[單選題]19.Iftheaverage(arithmeticmean)ofxandyis40,andz-x=60,whatistheaverageofyandz?A.20B.50C.65D.70E.140參考答案：D參考解析：因?yàn)閤+y=80，z-x=60，所以y、z的平均數(shù)為70，故本題選D項(xiàng)。[單選題]20.Donnaisamountainbikingenthusiast.OneSaturday,shespentthemorningbikingupanuphilldivailatanaveragespeedof20kilometersperhour,andthenreturnedbythesamerouteintheafternoonatanaveragespeedof25kilometersperhour.Ifthedownhilldivipintheafternoontook3／4ofanhourlessthantheuphilldivekinthemorning,howmanykilometersdidDonnarideeachway?A.50B.55C.65D.70E.75參考答案：E參考解析：設(shè)單程的距離為x，故，故x=75，所以本題選E項(xiàng)。[單選題]21.Ifxdollarsareinvestedat12percentforoneyearandydollarsareinvestedat8percentforoneyear,theannualincomefromthe8percentinvestmentwillexceedtheannualincomefromthe12percentinvestmentby$64.If$5,000isthetotalamountinvestedbetweenxandy,howmuchisinvestedat12percent?A.$1,680B.$1,997C.$3,003D.$3,320E.$3,500參考答案：A參考解析：根據(jù)題意列出等式0.08y=0.12x+64，y+x=5,000，故x=1680，所以選A項(xiàng)。共享題干題Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements,labeled(1)and(2),inwhichcertaindataaregiven.Youhavetodecidewhetherthedatagiveninthestatementsaresufficientforansweringthequestion.Usingthedatagiveninthestatementsplusyourknowledgeofmathematicsandeverydayfacts(suchasthenumberofdaysinJulyorthemeaningofcounterclockwise),youmustindicatewhetherA.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]1.Whatistheaverageofalistofn

consecutiveintegers?(1)Thesmallestnumberinthelistis5.(2)n=8參考答案：C參考解析：根據(jù)等差數(shù)列求和公式可知，（1）、（2）條件單獨(dú)一項(xiàng)都不能確定連續(xù)整數(shù)數(shù)列的平均數(shù)，兩者結(jié)合后可以確定，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]2.IndiviangleABC,whatisthelengthofAB?(1)ThelengthofBCis5andthelengthofACis12.(2)AngleC=90°.參考答案：C參考解析：根據(jù)三角形性質(zhì)可知，知道兩邊以及一角可以計算第三邊的長度，故選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]3.Ifallapplesatacertaingrocerystoreareequallypriced,andallpearsatthesamegrocerystoreareequallypriced,whatisthepriceofapear?(1)Eightpearscosteightycentsmorethaneightapples.(2)Tenapplescosttwentycentsmorethaneightpears.參考答案：C參考解析：將兩個條件結(jié)合可以計算出每個梨價值$0.60，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]4.Isa3>20?(1)a4>80(2)a5>200參考答案：B參考解析：若a4>80，不能判斷a的正負(fù)；若a5>200，則a>0，且a3>20，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]5.Howmanyprimefactorsofx

arealsoprimefactorsof

y?(1)x=30(2)y

isamultipleofx.參考答案：C參考解析：只根據(jù)（1）條件無法判斷y的情況；只根據(jù)（2）條件無法推測x的因子情況，故只有（1）、（2）條件結(jié)合才能回答問題，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]6.Atotalof72passengersareonaship,andtheygooutonanexcursioninboatsRandQ.Howmanyoftheship’spassengersarefemale?(1)Thereare13femalesonboatQ.(2)ThereareequalnumbersofwomenonboatsRandQ.參考答案：C參考解析：條件1中沒有涉及R船上女性的人數(shù)；條件2沒有給出具體的女性人數(shù)，故將兩條件相結(jié)合可以得出答案，所以本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]7.Isxyz=1?(1)x(y2)=1(2)5z=0參考答案：B參考解析：條件1不能確定z的值，故不能確定xyz是否等于1；若5z=0，則xyz=0，即xyz不等于1，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]8.Isrs=rx-2?(1)risanoddnumber(2)x=s+2參考答案：E參考解析：條件1不能確定r,s,x的值；條件2不能確定r的值；由x=s+2可以推知，s-x=2，但r(s-x)=2的前提條件是r=1，而條件1不能確定r是否為1，故將兩個條件結(jié)合也無法得到rs=rx-2，故本題選E項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]9.Whatisthenumberofmaleemployeesatthefactory?(1)Ifthefactorvweretohire150moreemployeesand2／3ofthemwerefemale,theratioofmaletofemaleemployeeswouldbe8:3.(2)Thefactoryhasatleasttwiceasmanymaleemployeesasfemaleemployees,anditemploysatleast150females.參考答案：E參考解析：分別用兩個條件計算，可以發(fā)現(xiàn)無法計算出男員工的數(shù)量；將兩個條件相結(jié)合也無法計算出男員工的數(shù)量，故本題應(yīng)選E項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]10.Ifeachofthesegmentsmarkedontheboardaboveisofequallength,andifxandyrepresenttheindicatedlinesontheboard,thenwhatisthedistancebetweenxandy?(Thereare12inchesinafoot).(1)Theboardisfivefeetlong.(2)xis18inchesfromthenearestendoftheboard.參考答案：D參考解析：通過條件1、2均可以知道xy間的距離為24英尺，故本題選D項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]11.Ifb>a,thenaiswhatpercentofb?(1)a=4(2)b=4a參考答案：B參考解析：由條件2可知，a是b的25%；條件1無法計算a、b關(guān)系，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]12.Ifnisaninteger,andn≠0,is(100+n2)/napositiveinteger?(1)n2=25(2)5n=25參考答案：B參考解析：條件1無法確定n的值；由條件2可知，n=5，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]13.Whatisthevalueofintegerx?(1)xisapositiveinteger(2)17≤x≤18參考答案：E參考解析：（1）中只能判斷x是整數(shù)，不能判斷x的具體值；（2）中只能判斷x的取值范圍，不能判斷x的具體值；（1）和（2）合起來也不能判斷x的具體值，因?yàn)閤可以等于17或者18。所以本題選E項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]14.Theholdofafishingboatcontainsonlycod,haddock,andhalibut.Ifafishisselectedatrandomfromthehold,whatistheprobabilitythatitwillbeahalibutorahaddock?(1)Therearetwiceasmanyhalibutascodinthehold,andtwiceasmanyhaddockashalibut.(2)Codaccountfor1/7ofthefishbynumberinthehold.參考答案：D參考解析：將兩條件分別代入計算，均可算出概率為6/7，故本題選D項(xiàng)。國外英語考試《GMAT》試題（網(wǎng)友回憶版）三[單選題]1.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.______.A.B.8C.9D.10E.參考答案：C參考解析：經(jīng)過計算可知，，故本題選C項(xiàng)。[單選題]2.Inthecircularregionshownabove,sectionsAandBrepresent3/8and5/11,respectively,oftheareaofthecircularregion.SectionCrepresentswhatfractionalpartoftheareaofthecircularregion?A.15/88B.2/11C.5/22D.45/88E.73/88參考答案：A參考解析：C所占比例=，故本題選A項(xiàng)。[單選題]3.Ifxis20percentgreaterthan88,thenx=______.A.68B.70.4C.86D.105.6E.108參考答案：D參考解析：x=88+88×20%=105.6，故本題選D項(xiàng)。[單選題]4.Afarmerwith1,350acresoflandhadplantedhisfieldswithcorn,sugarcane,andtobaccointheratioof5:3:1,respectively,buthewantedtomakemoremoney,soheshiftedtheratioto2:4:3,respectively.Howmanymoreacresoflandwereplantedwithtobaccounderthenewsystem?A.90B.150C.270D.300E.450參考答案：D參考解析：新增種植煙草的面積=，故本題選D項(xiàng)。[單選題]5.Ifathree-digitnumberisselectedatrandomfromtheintegers100to999,inclusive,whatistheprobabilitythatthefirstdigitandthelastdigitoftheintegerwillbothbeexactlytwolessthanthemiddledigit?A.1:900B.7:900C.9:1,000D.1:100E.7:100參考答案：B參考解析：100到999中首位數(shù)字=末位數(shù)字=第二位數(shù)字-2的數(shù)字有131，242，353，464，575,686，797，有7種可能，故本題選B項(xiàng)。[單選題]6.ThreedifferentlumberjackscanchopWamountofwoodin30minutes,45minutes,and50minutesaccordingtotheirdifferentlevelsofskillwiththeaxe.Howmuchwood,intermsofW,couldthetwofastestlumberjackschopin2hours?A.WB.6WC.WD.3WE.W參考答案：A參考解析：總伐木量=，故本題選A項(xiàng)。[單選題]7.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.LastyearJackiesaved5%ofherannualsalary.Thisyear,shemade10%moremoneythanlastyear,andshesaved8%ofhersalary.Theamountsavedthisyearwaswhatpercentoftheamountshesavedlastyear?A.56%B.76%C.158%D.176%E.188%參考答案：D參考解析：設(shè)Jackie去年收入為$100，則，故本題選D項(xiàng)。[單選題]8.If35percentof400is20percentofx,thenx=______.A.200B.350C.700D.900E.1,400參考答案：C參考解析：20%x=35%×400，故x=700.所以本題選C項(xiàng)。[單選題]9.Inasampleofassociatesatalawfirm,30percentaresecond-yearassociates,and60percentarenotfirst-yearassociates.Whatpercentageoftheassociatesatthelawfirmhavebeenthereformorethantwoyears?A.10B.20C.30D.40E.50參考答案：C參考解析：兩年以上的人員=1-30%-(1-60%)=30%，故本題選C項(xiàng)。[單選題]10.Acertainprosthodontistspecializesinimplantinggoldandsilverteethinhispatients’mouths.Hecharges$650foragoldtoothand$325forasilvertooth.Ifhistotalfeesforimplantinggoldandsilverteethlastweekwere$15,925intotal,andheimplantedfivemoregoldteeththansilverteeth,howmanyteethintotaldidheimplantovertheweek?A.31B.32C.33D.34E.35參考答案：A參考解析：設(shè)金牙的數(shù)量為x，銀牙的數(shù)量為y，故x=y+5，650x+325y=15925，故x=18.y=13，故本題選A項(xiàng)。[單選題]11.AdivavelcompanywantstocharteraplanetotheBahamas.Charteringtheplanecosts$8,000.Sofar,18peoplehavesignedupforthedivip.Ifthecompanycharges$300perticket,howmanymorepassengersmustsignupforthedivipbeforethecompanycanmakeanyprofitonthecharter?A.7B.9C.13D.27E.45參考答案：B參考解析：，故本題選B項(xiàng)。[單選題]12.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.Anengineerdesignedaballsothatwhenitwasdropped,itrosewitheachbounceexactlyone-halfashighasithadfallen.Theengineerdroppedtheballfroma16-meterplatformandcaughtitafterithaddivaveled46.5meters.Howmanytimesdidtheballbounce?A.5B.6C.7D.8E.9參考答案：A參考解析：從16米的平臺落下，反彈了8米，即總共走了24米；然后再從8米落下，重復(fù)這一過程，故在工程師接到球之前，球反彈了5次，所以本題應(yīng)選A項(xiàng)。[單選題]13.Theequation(R-3)/28=(S+8)/35relatesthevaluesoftwolinkedcurrencies,whereRisthevalueindollarsofonecurrencyandSisthevalueindollarsoftheothercurrency.WhichofthefollowingequationscanbeusedtoconvertdollarvaluesfromtheRcurrencytotheScurrency?A.S=(5R-47)/4B.S=(4R+47)/5C.S=(5R+17)/4D.S=(4R-17）/5E.S=5R/4-12參考答案：A參考解析：將化簡可知，故本題選A項(xiàng)。[單選題]14.Theflatdiviangularlotdepictedaboveisavailablefordevelopment.Ifx+x/2=150meters,whatistheareaofthelotinsquaremeters?A.125B.150C.1,500D.1,250√3E.2,500參考答案：D參考解析：三角形的邊長為50，50√3，100，故三角形的面積=1250√3，選擇D項(xiàng)。[單選題]15.Lastyear’sreceiptsfromthesaleofgreetingcardsduringtheweekbeforeMother’sDaytotaled$189million,whichrepresented9percentoftotalgreetingcardsalesfortheyear.Totalgreetingcardsalesfortheyeartotaledhowmanymilliondollars?A.17,010B.2,100C.1,890D.1,701E.210參考答案：B參考解析：通過計算可知，故本題選B項(xiàng)。[單選題]16.Aninvestorbought200sharesofstockinABCDcompanyin1990.By1992,theinvestmentwasworthonly2/3ofitsoriginalvalue.By1995,the200shareswereworthonly1/2oftheirvaluein1990.Bywhatpercentdidthevalueoftheinvestmentdropfrom1992to1995?A.16%B.25%C.33%D.50%E.66%參考答案：B參考解析：設(shè)200股ABCD公司的股票在1990年價值$300，則通過計算可知在1992年價值$200，1995年價值$150，故價值下降25%，本題選B項(xiàng)。[單選題]17.Whichofthefollowingcannotbethemeanoffivepositiveintegersa,b,c,dande?A.aB.d+eC.b+c+dD.(b+c+d)/3E.(a+b+c+d+e)/5參考答案：C參考解析：根據(jù)平均數(shù)的定義可知，b+c+d大于平均數(shù)，故本題選C項(xiàng)。[單選題]18.Solvetheproblemandindicatethebestoftheanswerchoicesgiven.Whatistheperimeterofthefollowingfigureabove?(Note,figurenotnecessarilydrawntoscale.)A.155B.185C.220D.235E.250參考答案：E參考解析：將上圖分為一個直角三角形和一個長方形，如圖所示：。周長=65+40+50+30+65=250，故本題選E項(xiàng)。[單選題]19.Iftheaverage(arithmeticmean)ofxandyis40,andz-x=60,whatistheaverageofyandz?A.20B.50C.65D.70E.140參考答案：D參考解析：因?yàn)閤+y=80，z-x=60，所以y、z的平均數(shù)為70，故本題選D項(xiàng)。[單選題]20.Donnaisamountainbikingenthusiast.OneSaturday,shespentthemorningbikingupanuphilldivailatanaveragespeedof20kilometersperhour,andthenreturnedbythesamerouteintheafternoonatanaveragespeedof25kilometersperhour.Ifthedownhilldivipintheafternoontook3／4ofanhourlessthantheuphilldivekinthemorning,howmanykilometersdidDonnarideeachway?A.50B.55C.65D.70E.75參考答案：E參考解析：設(shè)單程的距離為x，故，故x=75，所以本題選E項(xiàng)。[單選題]21.Ifxdollarsareinvestedat12percentforoneyearandydollarsareinvestedat8percentforoneyear,theannualincomefromthe8percentinvestmentwillexceedtheannualincomefromthe12percentinvestmentby$64.If$5,000isthetotalamountinvestedbetweenxandy,howmuchisinvestedat12percent?A.$1,680B.$1,997C.$3,003D.$3,320E.$3,500參考答案：A參考解析：根據(jù)題意列出等式0.08y=0.12x+64，y+x=5,000，故x=1680，所以選A項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]1.Whatistheaverageofalistofn

consecutiveintegers?(1)Thesmallestnumberinthelistis5.(2)n=8參考答案：C參考解析：根據(jù)等差數(shù)列求和公式可知，（1）、（2）條件單獨(dú)一項(xiàng)都不能確定連續(xù)整數(shù)數(shù)列的平均數(shù)，兩者結(jié)合后可以確定，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]2.IndiviangleABC,whatisthelengthofAB?(1)ThelengthofBCis5andthelengthofACis12.(2)AngleC=90°.參考答案：C參考解析：根據(jù)三角形性質(zhì)可知，知道兩邊以及一角可以計算第三邊的長度，故選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]3.Ifallapplesatacertaingrocerystoreareequallypriced,andallpearsatthesamegrocerystoreareequallypriced,whatisthepriceofapear?(1)Eightpearscosteightycentsmorethaneightapples.(2)Tenapplescosttwentycentsmorethaneightpears.參考答案：C參考解析：將兩個條件結(jié)合可以計算出每個梨價值$0.60，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]4.Isa3>20?(1)a4>80(2)a5>200參考答案：B參考解析：若a4>80，不能判斷a的正負(fù)；若a5>200，則a>0，且a3>20，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]5.Howmanyprimefactorsofx

arealsoprimefactorsof

y?(1)x=30(2)y

isamultipleofx.參考答案：C參考解析：只根據(jù)（1）條件無法判斷y的情況；只根據(jù)（2）條件無法推測x的因子情況，故只有（1）、（2）條件結(jié)合才能回答問題，故本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]6.Atotalof72passengersareonaship,andtheygooutonanexcursioninboatsRandQ.Howmanyoftheship’spassengersarefemale?(1)Thereare13femalesonboatQ.(2)ThereareequalnumbersofwomenonboatsRandQ.參考答案：C參考解析：條件1中沒有涉及R船上女性的人數(shù)；條件2沒有給出具體的女性人數(shù)，故將兩條件相結(jié)合可以得出答案，所以本題選C項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]7.Isxyz=1?(1)x(y2)=1(2)5z=0參考答案：B參考解析：條件1不能確定z的值，故不能確定xyz是否等于1；若5z=0，則xyz=0，即xyz不等于1，故本題選B項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]8.Isrs=rx-2?(1)risanoddnumber(2)x=s+2參考答案：E參考解析：條件1不能確定r,s,x的值；條件2不能確定r的值；由x=s+2可以推知，s-x=2，但r(s-x)=2的前提條件是r=1，而條件1不能確定r是否為1，故將兩個條件結(jié)合也無法得到rs=rx-2，故本題選E項(xiàng)。A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.[問答題]9.Whatisthenumberofmaleemployeesatthefactory?(1)Ifthefactorvweretohire150moreemployeesand2／3ofthemwerefemale,theratioofmaletofemaleemployeeswouldbe8:3.(2)Thefactoryhasatleasttwiceasmanymaleemployeesasfemaleemployees,anditemploysatleast150females.參考答案：E參考解析：分別用兩個條件計算，可以發(fā)現(xiàn)