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1、PP-DataSufficiency1(DS1)完整詳解版PracticeTest#1DataSufficiency(218Questions)1.86-!-item-!-187;#058&Agardenstorepurchasedanumberofshovelsandanumberofrakes.Ifthecostofeachshovelwas$14andthecostofeachrakewas$9,whatwasthetotalcostoftheshovelsandrakespurchasedbythe
2、store?(1)Theratioofthenumberofshovelstothenumberofrakespurchasedbythestorewas2to3.(2)Thetotalnumberofshovelsandrakespurchasedbythestorewas50.-------------------------------------------------------------------------------------------------------------------
3、-------------------------------------【答案】C【思路】設Qs為shovels的數量設Qr為rakes的數量題目問:14Qs+9Qr=?(1)Qs=2a,Qr=3a,只知比例,不知各為多少,無法求得數量,不充分(2)Qs+Qr=50,只知總和,不知各為多少,也無法求數totalcost,不充分(1)+(2)將(1)代入(2)可得a=10,即Qs=20,Qr=30,所以totalcost已經可以算出,充分!----------------------------------
4、----------------------------------------------------------------------------------------------------------------------2.142-!-item-!-187;#058&Ofthestudentswhoeatinacertaincafeteria,eachstudenteitherlikesordislikeslimabeansandeachstudenteitherlikesordislike
5、sbrusselssprouts.Ofthesestudents,dislikelimabeans;andofthosewhodislikelimabeans,alsodislikebrusselssprouts.Howmanyofthestudentslikebrusselssproutsbutdislikelimabeans?(1)120studentseatinthecafeteria.(2)40ofthestudentslikelimabeans.--------------------------
6、------------------------------------------------------------------------------------------------------------------------------129【答案】D【思路】beans~beanssproutsab~sproutscdt註:~代表dislike設t為totalstudents設likebeans&likesprouts人數為a設dislikebeans&likesprouts人數為b設lik
7、ebeans&dislikesprouts人數為c設dislikebeans&dislikesprouts人數為d已知d=題目問:b=?(1)t=120,得知b+d=80且d=50,所以得出b=30,充分(2)a+c=40=得出t=120同(1)也可以算出b,充分----------------------------------------------------------------------------------------------------------------------------
8、----------------------------3.196-!-item-!-187;#058&Howmanydifferentprimenumbersarefactorsofthepositiveintegern?(1)Fourdifferentprimenumbersarefactorsof2n.(2)Fourdifferentprimenumbersarefactorsofn2.----------
