GRE机经易错题.docx
- 文档编号:27827743
- 上传时间:2023-07-05
- 格式:DOCX
- 页数:15
- 大小:46.55KB
GRE机经易错题.docx
《GRE机经易错题.docx》由会员分享,可在线阅读,更多相关《GRE机经易错题.docx(15页珍藏版)》请在冰豆网上搜索。
GRE机经易错题
1.Howmanysuchnumbersin1-100thatwhendividedby5theremainderis3,anddividedby6theremainderis2?
A:
2
B:
3
C:
4
D:
5
E:
6
2.n>2
QuantityA
QuantityB
Thestandarddeviationof{2,2,2,n}
Thestandarddeviationof{2,n,n,n}
A:
QuantityAisgreater.
B:
QuantityBisgreater.
C:
Thetwoquantitiesareequal.
D:
Therelationshipcannotbedeterminedfromtheinformationgiven.
3.Whatisthe57digittotherightofthedecimalpointof
?
A:
2
B:
8
C:
5
D:
7
E:
1
4.
CD=6,pointAliesonlineCD,pointBisnotonlineCD,where1≤AB<2,what’stherangeofareaoftriangleBCD?
A:
3
B:
4
C:
5
D:
6
E:
8
5.TriangleABChasanacuteangleC,AC=3,BC=4,what’sthevaluerangeoflineAB?
A:
1
B:
2
C:
3
D:
4
E:
5
6.
AmanwalksfrompointAtopointBontherectangulargridsshown.Hecouldonlychoosetowalknorthoreastatanycorner,what’stheprobabilityofchoosingapathviapointC?
A:
B:
C:
D:
E:
7.
whereaandbarebothintegers,whatisthepossiblevalueofa+b?
A:
9
B:
12
C:
15
D:
17
E:
29
F:
100
G:
106
H:
109
8.kisanoddintegerwhichisgreaterthan100,disadivisorotherthankitself
QuantityA
QuantityB
d
A:
QuantityAisgreater.
B:
QuantityBisgreater.
C:
Thetwoquantitiesareequal.
D:
Therelationshipcannotbedeterminedfromtheinformationgiven.
9.Thereare30pencilsin5differentcolors,6pencilsineachcolor,howmanypencilsweneedtopicktoguaranteethateverycolorhasatleast2pencils?
A:
24
B:
25
C:
26
D:
27
E:
28
10.A10-daylongcourse,intheanalysisofattendanceforthreestudents:
Aattendedfor8days,Battendedfor7days,Cattendedfor6days,amongwhichonly1dayallofthemattended.Howmanydaysatleasttwostudentsattended?
A:
6
B:
7
C:
8
D:
9
E:
10
11.S={1,2,3,4,6},T={1,2,3,6,8},pickonenumberfromeachsetseparately,howmanydifferentpossibleproductofthetwoselectednumbers?
A:
10
B:
11
C:
12
D:
13
E:
14
12.Randomlyselectanumberfrom1-1000,whatistheprobabilitythatnoneofthedigitwouldbe6inthisnumber?
A:
B:
C:
D:
E:
13.Linelintersectedwithtwoparallellinesmandn.
QuantityA
QuantityB
Numberofpointswhichisatequal
distancetothreelines
3
A:
QuantityAisgreater.
B:
QuantityBisgreater.
C:
Thetwoquantitiesareequal.
D:
Therelationshipcannotbedeterminedfromtheinformationgiven.
14.m,narebothintegers,misafactorof
howmanypairsof(m,n)that
?
A:
Zero
B:
One
C:
Three
D:
Four
E:
Six
15.S={357889101112},T={3579101112}
QuantityA
QuantityB
ThestandarddeviationofSetS
ThestandarddeviationofSetT
A:
QuantityAisgreater.
B:
QuantityBisgreater.
C:
Thetwoquantitiesareequal.
D:
Therelationshipcannotbedeterminedfromtheinformationgiven.
16.Afour-digitnumber7a6b,a,barebothintegers,what’stheprobabilitythatthisnumberwouldbedividedby4?
________
17.TheprobabilityofAis60%andtheprobabilityofBis50%,whatisthemostpossibleprobabilitythatneitherAnorBwouldhappen?
A:
0.80
B:
0.40
C:
0.75
D:
0.55
E:
0.68
18.IfBobcandoajobin20daysandJanecandothejobin30days,theyworktogethertodothisjobandinthisperiod,Bobstopworkfor2.5daysandJanestopworkforxdays,andthejobbefinishedfor14days,whatisx?
A:
1.6
B:
3.2
C:
1.5
D:
1.25
E:
1.15
19.Inaninsurancecompany,eachpolicyhasapaperrecordandanelectricrecord.Forthosepolicieshavingincorrectpaperrecord,60%alsohavingincorrectelectricrecord;Forpolicieshavingincorrectelectricrecord,75%alsohavingincorrectpaperrecord.3%ofallpolicieshavebothincorrectpaperandincorrectelectricrecords.Ifwerandomlypickoutonepolicy,what’stheprobabilitythattheonehavingbothcorrectpaperandcorrectelectricrecords?
A:
0.80
B:
0.94
C:
0.75
D:
0.88
E:
0.92
20.Twolibrarians,RobertandPatricia,catalogedacombinedtotalof180newbooks,eachofwhichwascatalogedbyonlyoneofthetwolibrarians.Althoughtheyspentthesameamountoftimecatalogingtheirbooks,Robertspentanaverageof15minutesperbookwhereasPatriciaspentanaverageof12minutesperbook.
QuantityA
QuantityB
ThenumberofbookscatalogedbyRobert
60
A:
QuantityAisgreater.
B:
QuantityBisgreater.
C:
Thetwoquantitiesareequal.
D:
Therelationshipcannotbedeterminedfromtheinformationgiven.
21.TheunitpriceofcommodityXis$21.94,foreveryorderoncommodityX,ataxof$20wouldbeimposedonthebuyer.SomebuyerhasmadenordersoncommodityX,withthestandarddeviationof5onnumberofcommoditiesineveryorder.What’sthestandarddeviationofthetotalpricehe/shepaidforeveryorder?
A:
5
B:
21.94
C:
43.88
D:
109.7
E:
25
22.
Thereisa3*3table,weneedtofillitwiththreedifferentnumbers,A,BandC.Thereshouldnotbetwoidenticalnumbersineithereachroworeachcolumn.Howmanydifferentmethodsareavailable?
A:
6
B:
8
C:
10
D:
12
E:
16
23.Halhas4girlfriendsand5boyfriends.InhowmanydifferentwayscanHalinvite2girlsand2boystohisbirthdayparty?
A.54
B.60
C.72
D.120
E.240
24.Anofficehas6employees;thereare5femaleemployeesand1maleemployee.Inhowmanywayscana3-personcommitteebecreatedifthecommitteemustincludethemaleemployee?
A.10
B.12
C.15
D.24
E.30
25.Joanhas100candiestodistributeamong10children.Ifeachchildreceivesatleast1candyandnotwochildrenreceivethesamenumberofcandies,whatisthemaximumnumberofcandiesthatachildcanreceive?
A.10
B.34
C.39
D.45
E.55
26.Fromagroupof8people,itispossibletocreateexactly56differentk-personcommittees.Whichofthefollowingcouldbethevalueofk?
Indicateallsuchvalues.
A.1
B.2
C.3
D.4
E.5
F.6
G.7
27.Howmany4-digitnumbersbeginwithanevendigitandendwithanodddigit?
A250
B500
C2,000
D2,500
E5,000
28.Howmanypositiveintegerscanbeexpressedasaproductoftwoormoreoftheprimenumbers5,7,11,and13ifnooneproductistoincludethesameprimefactormorethanonce?
AEight
Bnine
CTen
DEleven
ETwelve
29.Nequalsthenumberofpositive3-digitnumbersthatcontainodddigitsonly.
QuantityA
N
QuantityB
125
A.QuantityAisgreater.
B.QuantityBisgreater.
C.Thetwoquantitiesareequal.
D.Therelationshipcannotbedeterminedfromtheinformationgiven.
30.
QuantityA
Numberofdifferenttrianglespossibleusingthegivenpointsasvertices.
QuantityB
42
A.QuantityAisgreater.
B.QuantityBisgreater.
C.Thetwoquantitiesareequal.
D.Therelationshipcannotbedeterminedfromtheinformationgiven.
31.Whatpercentoftheintegersbetween100and999,inclusive,haveallthreedigitsthesame?
A1%
B2%
C3%
D4%
E5%
32.Ofthe20lightbulbsinabox,2aredefective.Aninspectorwillselect2lightbulbssimultaneouslyandatrandomfromthebox.Whatistheprobabilitythatneitherofthelightbulbsselectedwillbedefective?
Giveyouranswerasafraction.
33.Foracertainprobabilityexperiment,theprobabilitythateventAwilloccuris1/2andtheprobabilitythateventBwilloccuris1/3.WhichofthefollowingvaluescouldbetheprobabilitythattheeventA∪B(thatis,theeventAorB,orboth)willoccur?
Indicateallsuchvalues.
A.1/3
B.1/2
C.3/4
34.AandBareindependentevents,andtheprobabilitythatbotheventsoccuris1/2.WhichofthefollowingcouldbetheprobabilitythateventAoccurs?
Indicateallsuchprobabilities.
A.0
B.1/4
C.1/2
D.3/4
E.1
35.Inacertainstate,eachlicenseplateconsistsofeitherthreedigits(between0and9,inclusive)followedbytwolettersorthreelettersfollowedbytwodigits.Forexample,055-XY,123-PP,andAAA-70areallacceptableplates.Howmanydifferentlicenseplatescanthestateissue?
36.Apositiveintegerisapalindromeifitreadsexactlythesamefromrighttoleftasitdoesfromlefttoright.Forexample,5and66and373areallpalindromes.Howmanypalindromesaretherebetween1and1,000,inclusive?
37.Aboxcontains10ballsnumberedfrom1to10inclusive.IfAnnremovesaballatrandomandreplacesit,andthenJaneremovesaballatrandom,whatistheprobabilitythatbothwomenremovedthesameball?
A.1/100
B.1/90
C.1/45
D.1/10
E.41/45
38.A:
{71,73,79,83,87}B:
{57,59,61,67}
IfonenumberisselectedatrandomfromsetA,andonenumberisselectedatrandomfromsetB,whatistheprobabilitythatbothnumbersareprime?
A.9/20
B.3/5
C.3/4
D.4/5
E.1
39.Aboxatayardsalecontains3differentchinadinnersets,eachconsistingof5plates.Acustomerwillrandomlyselect2platestocheckfordefects.Whatistheprobabilitythatthe2platesselectedwillbefromthesamedinnerset?
A.2/7
B.2/5
C.2/3
D.5/6
E.3/2
40.Ifanintegergreaterthan100andlessthan1,000istobeselectedatrandom,whatistheprobabilitythattheintegerselectedwillbeamultipleof7?
142/999
142/900
142/899
128/900
128/899
41.Thegreatestofthe21positiveintegersinacertainlistis16.Themedianofthe21integersis10.Whatistheleastpossibleaverage(arithmeticmean)ofthe21integers?
A.4
B.5
C.6
D.7
E.8
42.Foracertaindistribution,themeasurement12.1is1.5standarddeviationsbelowthemean,andthemeasurement17.5is3.0standarddeviationsabovethemean.Whatisthemeanofthedistribution?
A.13.8
B.13.9
C.14.0
D.14.1
E.14.2
Welcome!
!
!
欢迎您的下载,
资料仅供参考!
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- GRE 机经易错题
![提示](https://static.bdocx.com/images/bang_tan.gif)