(A)-4
(B)-2
(C)-1
(D)0
(E)3
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【答案】C
【思路】首先判斷 奇數-奇數-奇數=奇數,可排除答案只剩(C)(E)
代數字3577-5-3=-1
-1133-1-(-1)=3(可是題目說要正整數,所以-1不行)
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5.1353-!
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-187;#058&000886
Workingaloneatitsownconstantrate,amachinesealskcartonsin8hours,andworkingaloneatitsownconstantrate,asecondmachinesealskcartonsin4hours.Ifthetwomachines,eachworkingatitsownconstantrateandforthesameperiodoftime,togethersealedacertainnumberofcartons,whatpercentofthecartonsweresealedbythemachineworkingatthefasterrate?
(A)25%
(B)
(C)50%
(D)
(E)75%
6.1456-!
-item-!
-187;#058&000991
[?
]
Ifw,x,y,andzarenumbersonthenumberlineshown,whichofthefollowingproductsisleast?
(A)wy
(B)wz
(C)xy
(D)xz
(E)yz
7.1502-!
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-187;#058&001086
Acertaintelephonecompanyofferstwoplans,AandB.UnderplanA,thecompanychargesatotalof$0.60forthefirst7minutesofeachcalland$0.06perminutethereafter.UnderplanB,thecompanycharges$0.08perminuteofeachcall.Whatisthedurationofacall,inminutes,forwhichthecompanychargesthesameamountunderplanAandunderplanB?
(A)2
(B)9
(C)15
(D)21
(E)30
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【答案】B
【思路】設t為時間
ForA:
Charges=0.6+0.06(t-7)
ForB:
Charges=0.08t
依照題意charges相同0.6+0.06(t-7)=0.08t
0.02t=0.6-0.42=0.18
t=0.18/0.02=9min
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8.1608-!
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-187;#058&001224
Inthexy-plane,eachpointoncircleKhasnonnegativecoordinatesandthecenterofKisthepoint(4,7).WhatisthemaximumpossibleareaofK?
(A)
(B)
(C)
(D)
(E)
9.1662-!
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-187;#058&002391
Equalamountsofwaterwerepouredintotwoemptyjarsofdifferentcapacities,whichmadeonejarfullandtheotherjarfull.Ifthewaterinthejarwiththelessercapacityisthenpouredintothejarwiththegreatercapacity,whatfractionofthelargerjarwillbefilledwithwater?
(A)
(B)
(C)
(D)
(E)
10.1708-!
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-187;#058&002411
Apairofshoesisonsalefor$60.Ifthispriceis20percentlessthantheregularpriceoftheshoes,whatistheregularpriceoftheshoes?
(A)$72
(B)$75
(C)$80
(D)$96
(E)$108
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【答案】B
【思路】60/0.8=75
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11.1971-!
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-187;#058&002527
Whichofthefollowingliststhenumberofpointsatwhichacirclecanintersectatriangle?
(A)2and6only
(B)2,4,and6only
(C)1,2,3,and6only
(D)1,2,3,4,and6only
(E)1,2,3,4,5,and6
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【答案】E
【思路】
一個圓至多可以跟三角形有幾個交點
畫畫看6個==>E
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12.2238-!
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-187;#058&002618
[?
]
Ifthetworegionsabovehavethesamearea,whatistheratiot:
s?
(A)2:
3
(B)16:
3
(C)
(D)
(E)
13.2392-!
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-187;#058&002762
[?
]:
linemissed
(A)Acertainlistof100datahasanaverage(arithmeticmean)of6andastandarddeviationofd,wheredispositive.Whichofthefollowingpairsofdata,whenaddedtothelist,mustresultinalistof102datawithstandarddeviationlessthand?
(B)0and0
(C)0and6
(D)0and12
(E)6and6
14.2546-!
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-187;#058&002908
IfSallydrivesataconstantspeedof50milesperhour,howmanyminuteswillberequiredforhertodrive10miles?
(A)9
(B)10
(C)11
(D)12
(E)13
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【答案】D
【思路】距離/速度=時間
10/50=0.2(hr)=12(mins)
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15.2647-!
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-187;#058&002944
Ifa=1and[?
],whichofthefollowingisNOTapossiblevalueofb?
(A)-2
(B)-1
(C)0
(D)1
(E)2
16.2698-!
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-187;#058&002953
[?
]
Allpoints(x,y)thatliebelowthelinel,shownabove,satisfywhichofthefollowinginequalities?
(A)y<2x+3
(B)y<-2x+3
(C)y<-x+3
(D)
(E)
17.2747-!
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-187;#058&002959
[?
]
Onthenumberlineabove,whatisthelengthofsegmentAB?
(A)2.2
(B)0.38
(C)0.22
(D)0.038
(E)0.022
18.2793-!
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-187;#058&002984
Afterafishermansold[?
]ofthefishhehadcaughtandgaveaway[?
]oftheremainingfish,hehad4fishleft.Whatwasthetotalnumberoffishhehadcaught?
(A)8
(B)16
(C)20
(D)32
(E)40
19.2896-!
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-187;#058&003100
[?
]
Foreachcountrylistedintheleftcolumnofthetable,thenumberintherightcolumngivesthenumberofunitsofCountryXcurrencythatisequivalentto1unitofthecountry'scurrency.WhichofthefollowingisequivalenttothegreatestnumberofunitsofCountryXcurrency?
(A)4unitsofCountryAcurrency
(B)25unitsofCountryBcurrency
(C)98unitsofCountryCcurrency
(D)3unitsofCountryDcurrency
(E)7unitsofCountryEcurrency
20.2942-!
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-187;#058&003104
Foranypositiveintegern,thelengthofnisdefinedasthenumberofprimefactorswhoseproductisn.Forexample,thelengthof75is3,since75=3?
?
5?
?
5.Howmanytwo-digitpositiveintegershavelength6?
(A)None
(B)One
(C)Two
(D)Three
(E)Four
21.2988-!
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-187;#058&003110
Acompanywantstobuycomputersandprintersforanewbranchoffice,andthenumberofcomputerscanbeatmost3timesthenumberofprinters.Computerscost$1,500each,andprinterscost$300each.Whatisthegreatestnumberofcomputersthatthecompanycanbuyifithasatotalof$9,100tospendoncomputersandprinters?
(A)2
(B)3
(C)4
(D)5
(E)6
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【答案】D
【思路】
C=3P
1500C+300P
9100
1600C
9100
C
5.多所以最多可買5台computers
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22.3254-!
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-187;#058&003229
If[?
],thenNisbetween
(A)0and
(B)and
(C)and
(D)and
(E)and2
23.3470-!
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-187;#058&003305
240,120,60,30,...
Inthesequenceabove,eachtermafterthefirstis½oftheprecedingterm.Whatistheleasttermofthesequencethatisgreaterthan1?
(A)
(B)
(C)
(D)
(E)
24.3573-!
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