sat数学考试试题.docx

SAT数学真题精选
1.If2x+3=9,whatisthevalueof4x–3?
(A)5(B)9(C)15(D)18(E)21
2.If4(t+u)+3=19,thent+u=?
(A)3(B)4(C)5(D)6(E)7
3.Inthexy-coordinate(坐标)planeabove,thelinecontainsthepoints(0,0)and(1,2).IflineM(notshown)containsthepoint(0,0)andisperpendicular（垂直）toL,whatisanequationofM?
(A)y=-1/2x
(B)y=-1/2x+1
(C)y=-x
(D)y=-x+2
(E)y=-2x
4.IfKisdivisibleby2,3,and15,whichofthefollowingisalsodivisiblebythesenumbers?
(A)K+5(B)K+15(C)K+20(D)K+30(E)K+45
5.Thereare8sectionsofseatsinanauditorium.Eachsectioncontainsatleast150seatsbutnotmorethan200seats.Whichofthefollowingcouldbethenumberofseatsinthisauditorium?
(A)800(B)1,000(C)1,100(D)1,300(E)1,700
6.Ifrsuv=1andrsum=0,whichofthefollowingmustbetrue?
(A)r<1(B)s<1(C)u=2(D)r=0(E)m=0
7.Theleastintegerofasetofconsecutiveintegers(连续整数)is–126.ifthesumoftheseintegersis127,howmanyintegersareinthisset?
(A)126(B)127(C)252(D)253(E)254
8.Aspeciallotteryistobeheldtoselectthestudentwhowillliveintheonlydeluxeroominadormitory.Thereare200seniors,300juniors,and400sophomoreswhoapplied.Eachsenior’snameisplacedinthelottery3times;eachjunior’sname,2time;andeachsophomore’sname,1times.Ifastudent’snameischosenatrandomfromthenamesinthelottery,whatistheprobabilitythatasenior’snamewillbechosen?
（A）1/8(B)2/9(C)2/7(D)3/8(E)1/2

Question#1:50%ofUScollegestudentsliveoncampus.Outofallstudentslivingoncampus,40%aregraduatestudents.WhatpercentageofUSstudentsaregraduatestudentslivingoncampus?
(A)90%(B)5%(C)40%(D)20%(E)25%
Question#2:Inthefigurebelow,MNisparallelwithBCandAM/AB=2/3.WhatistheratiobetweentheareaoftriangleAMNandtheareaoftriangleABC?
(A)5/9(B)2/3(C)4/9(D)1/2(E)2/9
Question#3:Ifa2+3isdivisibleby7,whichofthefollowingvaluescanbea?
(A)7(B)8(C)9(D)11(E)4
Question#4:Whatisthevalueofb,ifx=2isasolutionofequationx2-b·x+1=0?
(A)1/2(B)-1/2(C)5/2(D)-5/2(E)2
Question#5:Whichvalueofxsatisfiestheinequality|2x|<x+1?
(A)-1/2(B)1/2(C)1(D)-1(E)2
Question#6:Ifintegersm>2andn>2,howmany(m,n)pairssatisfytheinequalitymn<100?
(A)2(B)3(C)4(D)5(E)7
Question#7:TheUSdeerpopulationincreaseis50%eve