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1、SAT数学真题精选1. If2x+3=9,whatisthevalueof4x–3?(A)5 (B)9 (C)15 (D)18 (E)212. If4(t+u)+3=19,thent+u=?(A)3 (B)4 (C)5 (D)6 (E)73. Inthexy-coordinate(坐标)planeabove,thelinecontainsthepoints(0,0)and(1,2).IflineM(notshown)containsthepoint(0,0)andisperpendicular（
2、垂直）toL,whatisanequationofM?(A)y=-1/2x (B)y=-1/2x+1 (C)y=-x (D)y=-x+2 (E)y=-2x4. IfKisdivisibleby2,3,and15,whichofthefollowingisalsodivisiblebythesenumbers?(A)K+5 (B)K+15 (C)K+20 (D)K+30 (E)K+455. Thereare8sectionsofseatsinanauditorium.Eachsectioncont
3、ainsatleast150seatsbutnotmorethan200seats.Whichofthefollowingcouldbethenumberofseatsinthisauditorium?第13页共13页(A)800 (B)1,000 (C)1,100 (D)1,300 (E)1,7006. Ifrsuv=1andrsum=0,whichofthefollowingmustbetrue?(A)r<1 (B)s<1 (C)u=2 (D)r=0 (E)m=07. Theleasti
4、ntegerofasetofconsecutiveintegers(连续整数)is–126.ifthesumoftheseintegersis127,howmanyintegersareinthisset?(A)126 (B)127 (C)252 (D)253 (E)2548. Aspeciallotteryistobeheldtoselectthestudentwhowillliveintheonlydeluxeroominadormitory.Thereare200seniors,300juni
5、ors,and400sophomoreswhoapplied.Eachsenior’snameisplacedinthelottery3times;eachjunior’sname,2time;andeachsophomore’sname,1times.Ifastudent’snameischosenatrandomfromthenamesinthelottery,whatistheprobabilitythatasenior’snamewillbechosen?（A）1/8 (B)2/9 (C)2/7
6、 (D)3/8 (E)1/2Question#1:50%ofUScollegestudentsliveoncampus.Outofallstudentslivingoncampus,40%aregraduatestudents.WhatpercentageofUSstudentsaregraduatestudentslivingoncampus?(A)90%(B)5%(C)40%(D)20%(E)25%第13页共13页Question#2:Inthefigurebelow,MNisparallelwithB
7、CandAM/AB=2/3.WhatistheratiobetweentheareaoftriangleAMNandtheareaoftriangleABC?(A)5/9(B)2/3(C)4/9(D)1/2(E)2/9Question#3:Ifa2+3isdivisibleby7,whichofthefollowingvaluescanbea?(A)7(B)8(C)9(D)11(E)4Question#4:Whatisthevalueofb,ifx=2isasolutionofequationx2-b·x+1
8、=0?(A)1/2(B)-1/2(C)5/2(D)-5/2(E)2Question#5:Whichvalueofxsatisfiestheinequality
9、2x
10、2andn>2,howmany(m,n)pairssatisfytheinequalitymn<100?(A)2(B)3(C)4
