GMAT真题5讲解.docx
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GMAT真题5讲解.docx
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GMAT真题5讲解
MathSection
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Q1:
ELECTRICITYUSAGEINACERTAIN
HOUSEHOLDONMAY1
Appliance
NumberofHoursinUse
NumberofWattsofElectricityUsedperHour
TV
4
145
Computer
3
155
VCR
2
45
Stereo
2
109
Accordingtothetableabove,whatwasthetotalnumberofwattsofelectricityusedforthefourappliancesinthehouseholdonMay1?
A.454
B.860
C.1,100
D.1,230
E.1,353
Answer:
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Q2:
Whatistheratiooftheaverage(arithmeticmean)heightofstudentsinclassXtotheaverageheightofstudentsinclassY?
(1)TheaverageheightofthestudentsinclassXis120centimeters.
(2)TheaverageheightofthestudentsinclassXandclassYcombinedis126centimeters.
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:
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Q3:
Ifacommitteeof3peopleistobeselectedfromamong5marriedcouplessothatthecommitteedoesnotincludetwopeoplewhoaremarriedtoeachother,howmanysuchcommitteesarepossible?
A.20
B.40
C.50
D.80
E.120
Answer:
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Q4:
√[2√63+2/(8+3√7)]=
A.8+3√7
B.4+3√7
C.8
D.4
E.√7
Answer:
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Q5:
Theinfinitesequencea1,a2,…,an,…issuchthata1=2,a2=-3,a3=5,a4=-1,andan=an-4forn>4.Whatisthesumofthefirst97termsofthesequence?
A.72
B.74
C.75
D.78
E.80
Answer:
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Q6:
Theratioofthenumberofredcarsinacertainparkinglottothenumberofblackcarsis3to8.Ifthereare72blackcarsinthelot,howmanyredcarsarethereinthelot?
A.11
B.15
C.24
D.27
E.32
Answer:
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Q7:
Whatisthevalueof│x+7│?
(1)│x+3│=14
(2)(x+2)2=169
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:
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Q8:
3
3
3
x3
Note:
Figurenotdrawntoscale.
Thefigureaboverepresentsasquaregardenthatisdividedinto9rectangularregionswithindicateddimensionsinmeters.Theshadedregionsareplantedwithpeas,andtheunshadedregionsareplantedwithtomatoes.Ifthesumoftheareasoftheregionsplantedwithpeasisequaltothesumoftheareasoftheregionsplantedwithtomatoes,whatisthevalueofx?
A.0.5
B.1
C.1.5
D.2
E.2.5
Answer:
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Q9:
Inthexy-plane,thepoint(-2,-3)isthecenterofacircle.Thepoint(-2,1)liesinsidethecircleandthepoint(4,-3)liesoutsidethecircle.Iftheradiusrofthecircleisaninteger,thenr=
A.6
B.5
C.4
D.3
E.2
Answer:
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Q10:
When200gallonsofoilwereremovedfromatank,thevolumeofoilleftinthetankwas3/7ofthetank’scapacity.Whatwasthetank’scapacity?
(1)Beforethe200gallonswereremoved,thevolumeofoilinthetankwas1/2ofthetank’scapacity.
(2)Afterthe200gallonswereremoved,thevolumeofoilleftinthetankwas1,600gallonslessthanthetank’scapacity.
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:
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Q11:
AcertainbusinessproducedxrakeseachmonthformNovemberthroughFebruaryandshippedx/2rakesatthebeginningofeachmonthfromMarchthroughOctober.ThebusinesspaidnostoragecostsfortherakesfromNovemberthroughFebruary,butitpaidstoragecostsof$0.10perrakeeachmonthfromMarchthroughOctoberfortherakesthathadnotbeenshipped.Intermsofx,whatwasthetotalstoragecost,indollars,thatthebusinesspaidfortherakesforthe12monthsformNovemberthroughOctober?
A.0.40x
B.1.20x
C.1.40x
D.1.60x
E.3.20x
Answer:
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Q12:
Foracertainplayperformance,adults’ticketsweresoldfor$12eachandchildren’sticketsweresoldfor$8each.Howmanychildren’sticketsweresoldfortheperformance?
(1)Thetotalrevenuefromthesaleofadults’andchildren’sticketsfortheperformancewas$5,040.
(2)Thenumberofadults’ticketssoldfortheperformancewas1/3thetotalnumberofadults’andchildren’sticketssoldfortheperformance.
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:
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Q13:
Whatistheremainderwhenthepositiveintegernisdividedby3?
(1)Theremainderwhennisdividedby2is1.
(2)Theremainderwhenn+1isdividedby3is2.
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:
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Q14:
Iftheaverage(arithmeticmean)ofx,y,and20is10greaterthantheaverageofx,y,20,and30,whatistheaverageofxandy?
A.40
B.45
C.60
D.75
E.95
Answer:
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Q15:
Ifxandyareintegers,isx+ygreaterthan0?
(1)xisgreaterthan0.
(2)yislessthan1.
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:
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Q16:
Whatisthevalueof3-(x+y)/3-(x-y)?
(1)x=2
(2)y=3
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:
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Q17:
Adrivercompletedthefirst20milesofa40-miletripatanaveragespeedof50milesperhour.Atwhataveragespeedmustthedrivercompletetheremaining20milestoachieveanaveragespeedof60milesperhourfortheentire40-miletrip?
(Assumethatthedriverdidnotmakeanystopsduringthe40-miletrip.)
A.65mph
B.68mph
C.70mph
D.75mph
E.80mph
Answer:
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Q18:
Ifthesymbol▼representseitheraddition,subtraction,multiplication,ordivision,whatisthevalueof6▼2?
(1)10▼5=2
(2)4▼2=2
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:
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Q19:
Inasurveyof200collegegraduates,30percentsaidtheyhadreceivedstudentloansduringtheircollegecareers,and40percentsaidtheyhadreceivedscholarships.Whatpercentofthosesurve
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