GMAT数学充分第二辑.doc

NUMPAGES9of

SECTION8
30Minutes25Questions
1.CommitteememberWwantstoscheduleaone-hourmeetingonThursdayforhimselfandthreeothercommitteemembers,X,Y,andZ,Isthereaone-hourperiodonThursdaythatisopenforallfourmembers?
(1)OnThursdayWandXhaveanopenperiodfrom9:00a.m.to12:00noon.
(2)OnThursdayYhasanopenperiodfrom10:00a.m.to1:00p.m.andZhasanopenperiodfrom8:00a.m.to11:00a.m.
2.IfJack’sandKate’sannualsalariedin1985wereeach10percenthigherthantheirrespectiveannualsalariesin1984,whatwasJack’sannualsalaryin1984?
(1)ThesumofJack’sandKate’sannualsalariesin1984was$50,000.
(2)ThesumofJack’sandKate’sannualsalariesin1985was$55,000.
3.Whatisthevalueofx?
(1)x+1=2–3x
(2)
4.Howmanynewspapersweresoldatacertainnewsstandtoday?
(1)Atotalof100newspapersweresoldatthenewsstandyesterday,10fewerthantwicethenumbersoldtoday.
(2)Thenumberofnewspaperssoldatthenewsstandyesterdaywas45morethanthenumbersoldtoday.
5.Howmuchdidacertaintelephonecallcost?
(1)Thecalllasted53minutes
(2)Thecostforthefirst3minuteswas5timesthecostforeachadditionalminute.
6.AcertainexpresswayhasexitsJ.K.L.andM,inthatorder.WhatistheroaddistancefromexitKtoexitL?
(1)theroaddistancefromexitJtoexitLis21kilometers.
(2)TheroaddistancefromexitKtoexitMis26kilometers.
7.Twocar,SandT,eachtraveledadistanceof50miles.DidcarSusemoregasolinethancarT?
(1)CarsSandTtraveledtheentiredistanceattheratesof55milesperhourand50milesperhour,respectively.
(2)Fortheentiredistance,carStraveled20milespergallonofgasolineandcarTtraveled25milespergallonofgasoline.
8.Ifnisapositiveinteger,isnodd?
(1)3nisodd.
(2)n+3iseven.
9.Does2m–3n=0
(1)m≠0
(2)6m=9n
10.Ifxy<3,isx<1?
(1)y>3
(2)x<3
11.Eachoftheeggsinabowlisdyedred,orgreen,orblue.Ifoneeggistoberemovedatrandom.whatistheprobabilitythattheeggwillbegreen?
(1)Thereare5redeggsinthebowl.
(2)Theprobabilitythattheeggwillbeblueis
12.Istheaverage(arithmeticmean)ofxandygreaterthan20?
(1)Theaverage(arithmeticmean)of2xand2yis48.
(2)x=3y

13.Marcia’sbucketcanholdamaximumofhowmanylitersofwater?
(1)Thebucketcurrentlycontains9liters