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棄我去者,昨日之日不可留亂我心者,今日之日多煩憂MathSection------------------------------------------------------------------------------------------------------------Q1:Afamily-sizeboxofcerealcontainsmorecerealandcostsmorethantheregular-sizeboxofcereal.Whatisthecostperounceofthefamily-sizeboxofcereal?(1)?Thefamily-sizeboxofcerealcontains10ouncesmorethantheregular-sizeboxofcereal.(2) Thefamily-sizeboxofcerealcosts$5.40. A.Stat(yī)ement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Stat(yī)ement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTO(shè)GETHERaresufficient,butNEITHERstat(yī)ementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q2:Acertainrollercoasterhas3cars,andapassengerisequallylikelytorideinany1ofthe3carseachtimethatpassengerridestherollercoaster.Ifacertainpassengeristoridetherollercoaster3times,whatistheprobabilitythat(yī)thepassengerwillrideineachofthe3cars?01/92/91/31Answer:------------------------------------------------------------------------------------------------------------Q3:Ifxandyarepositive,is4x>3y?(1) x>y-x(2)?x/y<1?A.Statement(1)ALO(píng)NEissufficient,butstat(yī)ement(2)aloneisnotsufficient.B.Statement(2)ALO(píng)NEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstat(yī)ementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALO(píng)NEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q4:Ifnistheproductoftheintegersfrom1to20inclusive,whatisthegreatestintegerkforwhich2kisafactorofn?1012151820Answer:------------------------------------------------------------------------------------------------------------Q5:Isx>k?(1)?2x?2k=4(2)?9x?3k=81 A.Statement(1)ALONEissufficient,butstat(yī)ement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstat(yī)ement(1)aloneisnotsufficient.C.BOTHstat(yī)ementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q6:Ifxandyarepositive,whatisthevalueofx–y?(1) (x2–y2)/(x+y)=4(2)?x+y=7?A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALO(píng)NEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstat(yī)ementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q7:Acircularmatwithdiameter20inchesisplacedonasquaretabletop,eachofwhosesidesis24incheslong.Whichofthefollowingisclosesttothefractionofthetabletopcoveredbythemat?5/122/51/23/45/6Answer:------------------------------------------------------------------------------------------------------------Q8:In1997therewere300femaleemployeesatCompanyC.IfthenumberoffemaleemployeesatCompanyCincreasedby60percentfrom1977to1987,bywhatpercentdidthenumberoffemaleemployeesatCompanyCincreasefrom1987to1997?(1) From1977to1997thenumberoffemaleemployeesincreasedby200percentatCompanyC.(2) In1977therewere100femaleemployeesat(yī)CompanyC.?A.Statement(1)ALONEissufficient,butstat(yī)ement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTO(shè)GETHERaresufficient,butNEITHERstatementALO(píng)NEissufficient.D.EACHstat(yī)ementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q9:Agardenerisgoingtoplant2redrosebushesand2whiterosebushes.Ifthegardeneristoselecteachofthebushesatrandom,oneatatime,andplanttheminarow,whatistheprobabilitythatthe2rosebushesinthemiddleoftherowwillbetheredrosebushes?1/121/61/51/31/2Answer:------------------------------------------------------------------------------------------------------------Q10:Asetofnumbershasthepropertythatforanynumbertintheset,t+2isintheset.If–1isintheset,whichofthefollowingmustalsobeintheset?-315A.?IonlyB. IIonlyC. IandIIonlyD. IIandIIIonlyE. I,II,andIIIAnswer:------------------------------------------------------------------------------------------------------------Q11:Inacorporation,50percentofthemaleemployee(cuò)sand40percentofthefemalee(cuò)mployeesareat(yī)least35yearsold.If42percentofalltheemployeesareatleast35yearsold,whatfractionoftheemployeesinthecorporationarefemales?3/52/33/44/55/6Answer:------------------------------------------------------------------------------------------------------------Q12:Ifnisanintegerand2<n<6,whatisthevalueofn?(1)?nisafactorof15.(2)?nisafactorof21. A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALO(píng)NEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstat(yī)ementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Stat(yī)ements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q13:Ifxandyarepositive,is3x>7y?(1) x>y+4(2)?-5x<-14y?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.Answer:------------------------------------------------------------------------------------------------------------Q14:If1050–74iswrittenasanintegerinbase10notation,whatisthesumofthedigitsinthatinteger?424433440449467Answer:------------------------------------------------------------------------------------------------------------Q15:Ann,Carol,andJudypaidatotalof$45fortheirdinnerat(yī)arestaurant.IfAnnpaid2/5ofthetotalamount,Carolpaid$17,andJudypaidtherest,whatfractionofthetotalamountdidJudypay?2/914/451/32/57/15Answer:------------------------------------------------------------------------------------------------------------Q16:IfJ,S,andVarepointsonthenumberline,what(yī)isthedistancebetweenSandV?(1)?Thedistancebetwee(cuò)nJandSis20.(2)?ThedistancebetweenJandVis25.?A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTO(shè)GETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q17:InTownX,64percentofthepopulationaree(cuò)mployed,and48percentofthepopulationaree(cuò)mployedmales.Whatpercentofthee(cuò)mployedpeopleinTownXarefemales?16%25%32%40%52%Answer:------------------------------------------------------------------------------------------------------------Q18: x xx x xThefigureshowsasquarepatiosurroundedbyawalkwayofwidthxmeters.Iftheareaofthewalkwayis132squaremetersandthewidthofthepatiois5metersgreaterthanthewidthofthewalkway,what(yī)istheareaofthepat(yī)io,insquaremeters?56646881100Answer:------------------------------------------------------------------------------------------------------------Q19:Atotalof$60,000wasinvestedforoneyear.Butofthisamountearnedsimpleannualinterestat(yī)therateofxpercentperyear,andtherestearnedsimpleannualinterestattherateofypercentperyear.Ifthetotalinterestearnedbythe$60,000forthatyearwas$4,080,whatisthevalueofx?(1)?x=(3/4)y(2)?Theratiooftheamountthat(yī)earnedinterestat(yī)therateofxpercentperyeartotheamountthatearnedinterestattherateofypercentperyearwas3to2. A.Statement(1)ALO(píng)NEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALO(píng)NEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TO(shè)GETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q20:Ifx>0,then1/[√(2x)+√x]=1/√(3x)1/[2√(2x)]1/(x√2)(√2-1)/√x(1+√2)/√xAnswer:------------------------------------------------------------------------------------------------------------Q21:WhenLeoimportedacertainitem,hemadea7percentimporttaxontheportionofthetotalvalueoftheiteminexcessof$1,000.IftheamountoftheimporttaxthatLeopaidwas$87.50,whatwasthetotalvalueoftheitem?$1,600$1,850$2,250$2,400$2,750Answer:------------------------------------------------------------------------------------------------------------Q22:Inthesequence1,2,4,8,16,32,…,eachtermafterthefirstistwicethepreviousterm.What(yī)isthesumofthe16th,17th,and18thtermsinthesequence?2183(217)7(216)3(216)7(215)Answer:------------------------------------------------------------------------------------------------------------Q23:Inthexy-plane,point(r,s)liesonacirclewithcenterattheorigin.Whatisthevalueofr2+s2?(1) Thecirclehasradius2.(2) Thepoint(√2,-√2)liesonthecircle. 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.Answer:------------------------------------------------------------------------------------------------------------Q24:Ifwandcareintegers,isw>0?(1)?w+c>50(2)?c>48 A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Stat(yī)ement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTO(shè)GETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q25:Aphotographerwillarrange6peopleof6differentheightsforphotographbyplacingthemintworowsofthreesothateachpersoninthefirstrowisstandinginfrontofsomeoneinthesecondrow.Theheightsofthepeoplewithineachrowmustincreasefromlefttoright,andeachpersoninthesecondrowmustbetallerthanthepersonstandinginfrontofhimorher.Howmanysucharrangementsofthe6peoplearepossible?5692436Answer:------------------------------------------------------------------------------------------------------------Q26:Runningattheirrespectiveconstantrates,machineX(qián)takes2dayslongertoproducewwidgetsthanmachineY.Attheserates,ifthetwomachinestogetherproduce5/4wwidgetsin3days,howmanydayswouldittakemachineXalonetoproduce2wwidgets?4681012Answer:------------------------------------------------------------------------------------------------------------Q27:Ifn=811–8,what(yī)istheunitsdigitofn?01468Answer:------------------------------------------------------------------------------------------------------------Q28:Foranypositiveintegern,thesumofthefirstnpositiveintegersequals[n(n+1)]/2.What(yī)isthesumofalltheevenintegersbetween99and301?10,10020,20022,65040,20045,150Answer:------------------------------------------------------------------------------------------------------------Q29:June25,1982,fellonaFriday.OnwhichdayoftheweekdidJune25,1987,fall?(Note:1984wasaleapyear.)SundayMondayTuesdayWednesdayThursdayAnswer:------------------------------------------------------------------------------------------------------------Q30:Joannaboughtonly$0.15stampsand$0.29stamps.Howmany$0.15stampsdidshebuy?(1)?Shebought$4.40worthofstamps.(2)?Sheboughtanequalnumberof$0.15stampsand$0.29stamps.?A.Statement(1)ALONEissufficient,butstat(yī)ement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstat(yī)ementsTOGETHERaresufficient,butNEITHERstatementALO(píng)NEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q31:Apositiveintegernissaidtobe“prime-saturat(yī)ed”iftheproductofallthedifferentpositiveprimefactorsofnislessthanthesquarerootofn.Whatisthegreatesttwo-digitprime-saturatedinteger?9998979695Answer:------------------------------------------------------------------------------------------------------------Q32:Foraconvention,ahotelchargesadailyroomrateof$120for1personandxdollarsforeachadditionalperson.What(yī)isthechargeforeachadditionalperson?(1) Thedailycostperpersonfor4peoplesharingthecostofaroomequallyis$45.(2) Thedailycostperpersonfor2peoplesharingthecostofaroomequallyis$25morethanthecorrespondingcostfor4people.?A.Statement(1)ALO(píng)NEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q33:Isxy>x/y?(1)?xy>0(2)?y<0?A.Statement(1)ALO(píng)NEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstat(yī)ementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q34:Thefunctionfisdefinedbyf(x)=-1/xforallnonzeronumbersx.Iff(a)=-1/2andf(ab)=1/6,thenb=31/3-1/3-3–12Answer:------------------------------------------------------------------------------------------------------------Q35:Whatisthemediannumberofemployee(cuò)sassignedperprojectfortheprojectsatCompanyZ?(1) 25percentoftheprojectsatCompanyZhave4ormoreemployeesassignedtoeachproject.(2) 35percentoftheprojectsatCompanyZhave2orfeweremployeesassignedtoeachproject.?A.Statement(1)ALONEissufficient,butstat(yī)ement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstat(yī)ement(1)aloneisnotsufficient.C.BOT
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