GRE備考資料最析GRE練習(xí)60題

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9.40a

10.

Eachofthenumbersx，y，w，andz(notnecessarilydistinct)canhaveanyofthevalues2，3，

9，or14.

11.wz

a=-219

12.a+aa+a

13.x+2x+1x

a>h

14.de

w，x，y，andzareconsecutivepositiveintegersandw

15.Theremainderwhen1

(w+x)(x+y)(y+z)

isdividedby2

16.Acertainmachinedrills30holesin8minutes.

Atthatconstantrate，howmanyholeswill4suchmachinesdrillin1hours?

(A)300

(B)900

(C)960

(D)1，200

(E)2，560

17.Tina，Ed，andLaurenagreetosharethecostofagiftandtomaketheircontributionsinproportiontotheirages.Ed"sageisofTina"sage，andLauren"sageisofEd"sage.IfLauren"sshareofthecostis$2.50，whatisthecostofthegift?

(A)$25

(B)$20

(C)$15

(D)$12

(E)$10

18.Threesolidcubesoflead，eachwithedges10centimeterslong，aremeltedtogetherinalevel，rectangular-shapedpan.Thebaseofthepanhasinsidedimensionsof20centimetersby30centimeters，andthepanis15centimetersdeep.Ifthevolumeofthesolidleadisapproximatelythesameasthevolumeofthemoltedlead，approximatelyhowmanycentimetersdeepisthemeltedleadinthepan?

(A)2.5

(B)3

(C)5

(D)7.5

(E)9

19.WhichofthefollowingCANNOTbethesumoftwointegersthathaveaproductof30?

(A)31

(B)17

(C)-11

(D)-13

(E)-21

20.Intherectangularcoordinatesystemabove，ifpoint(a，b)，shown，andthetwopoints(4a，b)and(2a，2b)，notshown，wereconnectedbystraightlines，thentheareaoftheresultingtriangularregion，intermsofaandb，wouldbe

(A)

(B)ab

(C)

(D)2ab

(E)4ab

Questions21-22refertothefollowinggraph.

Thetopandbottomofeachbarindicate，respectively，thehighestandlowestdailynumberofshirtssoldduringthemonth.Theheavylineacrosseachbarindicatestheaverage(arithmeticmean)numberofshirtssoldperdayduringthemonth.

21.Whatwastherangeinthedailynumberofshirts

soldduringMarch?

(A)20

(B)45

(C)50

(D)60

(E)70

22.Theaverage(arithmeticmean)numberofshirtssoldperdayduringFebruarywasapproximatelywhatpercentgreaterthantheaveragenumbersoldduringJanuary?

(A)10%

(B)20%

(C)30%

(D)40%

(E)70%

Questions23-25refertothefollowinggraph.

23.Forwhichtwousesofelectricitywastheratiooftheamountsofelectricityusedmostnearly3to1?

(A)Waterheaterandlights/smallappliances

(B)Largeappliancesandlights/smallappliances

(C)Airconditionerandwaterheater

(D)Airconditionerandlights/smallappliances

(E)Airconditionerandlargeappliances

24.Theelectricityusedbythewaterheaterwasmeasuredseparatelyanditscostperkilowatt-hourwasone-halfthecostperkilowatt-houroftherestoftheelectricityused.Thecostoftheelectricityusedbythewaterheaterwasmostnearlywhatfractionofthetotalcostofalltheelectricityused?

(A)

(B)

(C)

(D)

(E)Itcannotbedeterminedfromtheinformationgiven.

25.InNovembertheSmythehouseholdusedthesametotalamountofelectricityasinJuly，butthewaterheaterused33percentofthistotalamount.ByapproximatelywhatpercentdidtheamountofelectricityusedbythewaterheaterincreasefromJulytoNovember?

(A)13%

(B)33%

(C)50%

(D)65%

(E)130%

26.Oneintegerwillberandomlyselectedfromthentegers11to60，inclusive.Whatistheprobabilityhattheselectedintegerwillbeaperfectsquareoraerfectcube?

(A)0.1

(B)0.125

(C)0.16

(D)0.5

(E)0.9

27.Themeasuresoftwoanglesofaparallelogramifferby52degrees.Thenumberofdegreesinthemallerangleis

(A)38

(B)52

(C)64

(D)76

(E)128

28.Theoddsinfavorofwinningagamecanbefoundbycomputingtheratiooftheprobabilityofwiningtotheprobabilityofnotwinning.iftheprobabilitythatPatwillwinagameis，whataretheoddsthatPatwillwinthegame?

(A)4to5

(B)4to9

(C)5to4

(D)5to9