gmat复习gwd数学部分考试难点总结

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1、MathSection------------------------------------------------------------------------------------------------------------Q1:Afamily-sizeboxofcerealcontainsmorecerealandcostsmorethantheregular-sizeboxofcereal.Whatisthecostperounceofthefamily-sizeboxofcereal?(1)Thefamily-sizeboxofcerealcontains1

2、0ouncesmorethantheregular-sizeboxofcereal.(2)Thefamily-sizeboxofcerealcosts$5.40.A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.

3、D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHERareNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q2:Acertainrollercoasterhas3cars,andapassengerisequallylikelytorideinany1ofthe3carseachtimethatpas

4、sengerridestherollercoaster.Ifacertainpassengeristoridetherollercoaster3times,whatistheprobabilitythatthepassengerwillrideineachofthe3cars?01/92/91/31Answer:------------------------------------------------------------------------------------------------------------Q3:Ifxandyarepositive,is4x>

5、3y?(1)x>y-x(2)x/y<1A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.D.EACHstatementALONEissufficient.E.Statements(1)and(2)TOGETHER

6、areNOTsufficient.Answer:------------------------------------------------------------------------------------------------------------Q4:Ifnistheproductoftheintegersfrom1to20inclusive,whatisthegreatestintegerkforwhich2kisafactorofn?1012151820Answer:---------------------------------------------

7、---------------------------------------------------------------Q5:Isx>k?(1)2x•2k=4(2)9x•3k=81A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.C.BOTHstatementsTOG