1. X is a positive integer. 2-height of X is defined as the greatest negative
integer n where 2^n is a factor of X. K and M are two positive integers. Whether
2-height of K is greater than 2-height of M?
a. K is greater than M
b. K is even times of M
(Key: B)
2. X, Y and Z are three different prime numbers. How many factors does X*Y*Z
have? (Key: 8)
3. XY>Z?
a. XYZ>1
b. XYZ^2=1
(Key: C)
4. XYZ>0?
a. XY>0
b. YZ>0
(Key: E)
5. 7^3*7^4=? (Key: 7^7)
6. A is 25% less than B and B is 25% less than C. How much percent is A less
than C? (Key: 1/3)
7. A can finish one job in X hours. A does this job three times as fast as B
does. If A and B work together, how many hours can they finish the job? (Key:
3X/4)
8.能否确定N?, 条件是
1 (69+N)^1/2,(94+N)^1/2 是连续整数
2 (94+N)^1/2,(121+N)^1/2 是连续整数
我答D
9.还有就是两条平行线,一条有5个点,一条4个点问能组成多少个直角三角形
我答70个
10. 一个正三角形,边长5,中间内切一圆,问圆的面积
11. 在坐标系中有3点P(2,1),M(5,1),N,(5,5).问从P->M->N的距离比从P直接到N的距离大多少
12. R,S,T为正整数,问T/S^2是否是整数? 1)T/RS是整数 2)R/S是整数
13. 0.6是0.0015的多少倍?(400)
14. 唯一的jj:有一box,厚度of the plastic 是1,inner三个边长为x,y,z,求plastic
的体积。(x+2)(y+2)(z+2)-xyz把式子展开就是了。
15.有一梯形ABCD,AD=CD,P为AD上一点,求梯形面积。
(1)PD=5 (2)BC=8 (数字不准确) 我选E
16.有12个什么DD,其中3个defective,某人买2个randomly,问neither is defective的概率?
17.一直角三角形,直角顶点为(0,3),一点为(-4,0),另一点为(b,0),求b?
18.2个数的积为48,其中一个比另一个大2,求大的那个数? (8)
19.一个半圆的street,直径为1mile,7个点把这个半圆分成相等的8段,某人以15mile/hour从最左一点开始走,问3分钟后他在哪2点之间?
(好象是在第四段)
20. 一公司A业务占总收入的25%,B业务占t%,C业务占余下的,B业务收入是150,000 C业务是总收入-225,000 求t=?
My Answer: 50%
21. 在电话厅前排队,J前有13个人,问队伍总共多少人
(1) C后有16个人
(2) C前J后有3个人
My Answer: C
22. A circle inscribed in an equilateral triangle with side length = 10. What is
the area of inscribed circle?
23. 机经的题目,W到X到Y到Z,三个送信人,一个速度70mile/分钟,一个速度80mile/分钟,一个速度100mile/分钟,总长750mile
求X到Y长,
答案是240
24. x = (10 的100 次方), if (x的x次方) = (10 的k 次方), what is k?
My Answer: k = 200. (Not sure if my answer is correct)
Old JJ:
X=10^100,有X^X= 10^K, 问K等于多少
remeo评价意见:10^102
25. If X is between 4497 and 4509, which number is closest to 23/(30X)?
My Answer: 3451
26. A right triangle is on top of a square. Square side is 100, right triangle
sides are 60, 80 and 100 (common side with the square). How many bags of
fertilizer to cover entire area? (1 bag covers 2000 sq. feet.)
My Answer: 7 bags.
27. Make a code of different letters from 10 letters (A,B, ….). What’s the ratio
of 5 letter code to 4 letter code?
My Answer: P(5, 10)/P(4, 10) = 6
28. r+s+t 是偶数么?
(1)r+s是偶数
(2)s+t是偶数
29. 有线段AC,AC上的一段AB正好是某圆柱体的体对角线(有图,看图会很清楚,我的描述可能不大清楚),能求出AC的长么?
(1)BC=2
(2)AC有3/4长度在圆柱体内
30. 1998 sales increases x percent from 1997, 1999 sales decreases x percent
from 1998, 1999 is 9 percent less than 1997. What is X?
My Answer: 30 percent
31. R=S(100)/P, in the equation, R is the real salary of a person, S is the
current salary, and P is a kind of index. Whether the person
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real salary now is more than the real salary of 1967?
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current salary now is 94% more than that of 1967
(2) the index of 1967 is 100 and the index of now is 182
32. a, b are nonnegative numbers and (a-b)/(a+b)=1/2, which one of the following
must be true?
作者答案及思路:(Choice C: a>b)
33. A和B两个工程,A占2/3,B占余下的,B要花的时间是7/5 as much as A 问B花的时间占总共时间多少,
我的答案好象是7/17
34. y=1/(3-6/(x-4)), What is x defined as?
I 4
II 6
III 8
35. 有一个连续数的集合,问7是否在这个集合里面
a) -7在里面
b) 9在里面
36. A rectangle ABCD area is 84, point E is on line AB and AE/EB = 4/3, point F
is on line DC, what is area of triangle AFE?
37.一个圆圆心在(0,0),一直线y=x,k同时在圆上和线上,问k坐标:
答案:(跟号2 除以1,跟号2 除以1)
38.JJ本月题99到301间的偶数的和
答案:20200
方法:99到301间的偶数的和=100到300间的偶数的和,等差数列求和=(A1+An)*N/2=(100+300) * 101/2=20200
39.JJ本月题 (X^ N) / (X-1)= X ^ (N-1) + X ^ (N-2) + …+1, 且7^8= 一个具体的数值C,问7^9=?
答案:
方法:假设X=7, N=9, 那么7^9 / 6 = 7^8 + 7^7+7^6+…+1
假设X=7, N=8, 那么7^8 / 6 = 7^7+7^6+…+1
因为 7^8=C,所以 7^7+7^6+…+1 = C/6
综合以上=〉 7^9 = 6(C+C/6)=7C/6
说明:具体公式可能略有偏差,但方法是这样的,请大家掌握此类方法,勿记答案。
40.ABCDEFG中随便取3个,但是AB不能在一起,问可能性?
答案:C(7,3)-5
41.圆柱体CAN, 半径=R,高=H, 若另一个圆柱体积相同,r=2/3 R, 那么高h为多少?
9/4h
42.DS: 两个数列S,T,S 由偶数组成,T由奇数组成,两个数列个数相同,问S的MEDIAN 和T的算术平均值谁大?
(1) S,T 为连续的数
(2) S的算术平均值大于T的
43. 452*36*17
7 个数字中,哪个数字增加1,乘积增加小于1000?
A. 1
B. 2
C. 5
D. 7
E. 4
44. N 有几个不同的质数?
A. N 是7200的因子
B. 180 是N的因子
45. M, P, T 是positive integer, m
A. T-P=P-M
B. Forgot
46. 一个序列,从第三位数起,每个数都与它前面连续的两个数的和有关,the number is the sum of the 2 numbers in the
sum is odd or ½ if the sum of the 2 numbers are even, the forth number is 7 and
the fifth number is 5, what is the first number?
47. Give the English definition of standard deviation, 2 or 3 lines, there are 4
numbers, 9, 8, 7, 4, ask the standard deviation of these 4 numbers?
48. X, Y 是正整数,X 是3的倍数吗?
A. X-Y 是3的倍数
B. X-2Y是3的倍数
49. N除以3的余数是多少?
A. N除以2 余1
B. N+1除以3 余2
50. 正方体内有以内切球,直径为6,求正方体内最长的一条对角线长度
51.一正方形,10 <长< 20, 5<宽<9, 求周长范围
52.
A. S, T 关系
B. t > 1
题目记不清,但是通过A, 求出T 有两值1,2,根据B,可确定T=2, 则答案选C
53. 卖门票 on Monday & Tuesday, children’s ticket $7 each, adult $10 each,
children’s number on Tues is twice the number on Monday, adult’s number on Tues
is ½ the number on Monday, the total revenue on Monday is $2700, revenue on
Tuesday is $2400, what’s the children’s number on Monday?
54. –2
55.3个不同的旗子排列视为一个信号,有四面不同的旗子,可排成几个信号?
56.从50加到100的和?
57.孩子们拿笔,either 3 pens , 2 pencils, or 1 pen, 3 pencils, the average pen number
is 1.6, what’s the average pencils number? (the number is not accurate)
58. lottery $16 billion, separate as gifts, government payment, and expense,
give the relation of payment and gift & the relation of payment and
presentation, ask the payment in $ amount
59. 7 red tomatoes, 5 green tomatoes, ask the probability of all 3 tomatoes are
red ….
60. 某数的80%是多少? (具体叙述忘了,但翻译过来就是求这个式子)
61. Is xy >x^2y^2
A. 14X^2=3
B. Y^2=1
62. Mary 和 Tom 同时从a地出发到b地,问Mary 比 Tom早到几分钟?
A. a地到b地距离100miles.
B. Mary的小时速度 比 Tom小时速度快5 miles.
63. r>1, r * = 1-(1/r) what’s the value of : r * - (r-1)*
64. Is xyz>0
A. XY>0
B. YZ>0
65. A (0,3) B (-2,0), C在AB上,C的横坐标是-5,求纵坐标?(数不准,有图)
66.People in Senior only is 16, ppl in physics only is 24. ppl in senior only +
ppl both in senior and physics = ppl in physics only. What’s the percentage does
ppl both in senior and physics account for all senior ?
67. 一个三角形x,y,z,分别为三个外角,确定x的度数?
A. x=y
B. x=z
68. DS 根据账户里的钱付费用问题,$400 之内付1。5%,超出部分付1.2%, 求某人上月账户里有多少钱?
(题目叙述长,数不准)
69. 溶液问题:10单位混合物,含有30%的A,70%的B,问要取去多少单位的混合物,换成A,使新的混合物中A、B各占50%?
[确认]20/7
[思路]设要取去X单位的混合物,解方程X*70%=10*(70%-50%)可得。
70. 集合题:参加股东会的人中62%为股东,47%为公司员工,问参加会议的是股东中不是员工的比例?
[确认]53%
[思路]62%-(62%+47%-100%)=53%
71. 假如X、Y均为正整数,且10<X<20, 40<Y<60, 那么(XY) ^2的千位数最小是:
a. 4,b. 5,c. 6,d. 7,e. 8
[确认]A
[思路]最笨的办法:举例。(11*51)^2=314721,正好千位数是4。巧合?
[讨论]是否应该有其他的解法?如果题目问X(Y^2)最小的千位数怎么办?
72. 有10个人,包括bush,
先从这10个人中选出1个人当总统,再从9个人中选出一个当司机,最后从8个人当中选出一个当秘书,问bush被选为司机的概率是多少?a. 1/720,b.
1/80,c. 1/8,d. 1/9,e. 1/10
[确认]E
[思路](C91*C11*C81)/(C101*C91*C81)=1/10
73. 下面哪是循环小数?a. 1/(23*54),b. 1/(32*5),c. 32/(22*54),Ans: a和c
[确认]A和C
74. 小于500的正整数中,被7除余1,且被3除余2的数有多少?
[确认]24
[思路]7X+1=3Y+2,且X,Y为正整数。等式左边是一个以7为公差的等差数列,首项为8;等式右边是一个以3为公差的等差数列,首项为5。满足等式的首项为8。因为7和3均为质数,则第二个满足等式的数字只能是以3*7为公差的数字,即29。这样(500-8)/21=23,加上8本身,满足条件的数字的个数应该为24。
75. m是75,98,140的公倍数,问那个正确
a. 忘了,但不对
b. m为49的倍数
c. m大于14000
[讨论]B
76.W、X、Y、Z的方差和下列那些相等?
A,/W/,/X/,/Y/,/Z/
B,W^2,X^2,Y^2,Z^2
C,W-7,X-7,Y-7,Z-7
D,
E,1/W,1/X,1/Y,1/Z
77.452*36*17
7 个数字中,哪个数字增加1,乘积增加小于1000?
A. 1
B. 2
C. 5
D. 7
E. 4
78.一个普通的五边形,按顺时针顶点为ABCDE, AB=5,BC=4,CD=3,DE=10,问AE=可能等于5,10,15中的那个数
79.A 和 B 穿过一花园,A的速度是6里/小时,B的速度是10里/小时,A比B早到终点10分钟,问A比B提前多少时间出发?
80.一个序列,从第三位数起,每个数都与它前面连续的两个数的和有关,the number is the sum of the 2 numbers in the
sum is odd or ½ if the sum of the 2 numbers are even, the forth number is 7 and
the fifth number is 5, what is the first number?
81.(X^ N) / (X-1)= X ^ (N-1) + X ^ (N-2) + …+1, 且7^8= 一个具体的数值C,问7^9=?
82.1.2的80%?
83.Give the English definition of standard deviation, 2 or 3 lines, there are 4
numbers, 9, 8, 7, 4, ask the standard deviation of these 4 numbers。ANS:根号下14
84.3个不同的旗子排列视为一个信号,有四面不同的旗子,可排成几个信号?ANS:24
85.A数列有5个数,w,x,y,z,t, 问下面哪个数列的sd和A 相同?
|w|,|x|,|y|,|z|,|t|
1/w,1/x,1/y,1/z,1/t
7w,7x,7y,7z,7t,7t
w^2,x^2,y^2,x^2,t^2
w-7,x-7,y-7,z-7,t-7
我不知道选什么
86.a
jogger\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s
speed is 10 kelometer per hour, walker 6k/hour, 有个water foundation , if the
jogger pass the water foundation after passing the walker, howmany minitutes
does the jogger pass the water foundation before the walker.
87. 有两个人存了相同的一笔钱到银行,A是按照每月x% 复利记息,B是按照每年y%复利记息,问,一年后,若两人获得相同的利息,
(1)两人存的钱是***(具体数字)
(2)x=7
88.Buy with the wholesale price, and sell as 10% discount as the list price, a
20% profit on the wholesale price, what is the list price..
Answer : 120
89.The range of 1/2 + 1/2^2+ 1/2^3+….+1/2^10
A: 0—1/2 B: 2/3---1 C cannot remember , I forget the formual for this
90. 1/1000 equallys to A: 0.1/100 B: 0.01/10 …….
91.一个游泳池有三个水管。二个是出水管,若独立工作分别需要2小时与3小时倾干泳池。进水管需要6小时填满泳池。若现在泳池有1/2满,问三个水管同时工作需要多长时间倾空泳池?好象答案是45分钟。
92.已知a、b是大于2的不同质数,问以下哪个有可能是质数
ab
a+b
a^2+b^2 (记得不是很清楚了)
a^2+2b
a+b+1
93. Senior/physics那道老机经,但是问题不太一样。我算出来是33.3%,不是老机经的50%
94. 第一道题,问0.6是0.0015的多少倍。
95. 下列哪个数可能是1/n-1/(n+1)的值,n为integer。我选1/30
96. wholesale那道老机经。Wholesale price is $90, sell as 10% discount of the retail
price and earn 20% profits. What’s the retailer price?
97. Ds: t为(r-s)的算数平方根,t、r、s为integar。条件一r小于9,条件二t大于1
98. Ds:问(3^4n)+1被10整除余数是否为0。条件一,n=2m+1,m为positive integer;条件二,n大于4
99. 已知(x+1)^2的 units digit为1,(x+3)^2的units digit也为1,问(x-3)^2的digit units是多少?
100. 老机经,12个笔,3个defective,任意取3支,neither is defective 的组合有多少?
101.老机经,ds: 问n有几个不同质数因子。条件一,n是7200的因子,条件二,180是n的因子。
102. DS:有图,梯形ABCD,其中AB平行于CD,CD等于BC,E是CD上的一点,角BCD为直角。问梯形ABCD的面积,条件一AB=10,条件二BE=6。
103. 一数列为1/91, 1/92, …. 1/99, 1/100,问其和的范围
104.
DS:有一数列满足,x在数列中,则-x也在该数量中;x、y在数列中,xy也在该数列中。问12是否在该数列中。条件一,2在该数列中;条件二,6在该数列中。
105.DS:已知数列的第一项,问能否得出数列的第10项。条件一,Xi=ai (这个条件记得不是很清楚);条件二,Xi=(Xi-1)+i
106. DS:问x+y的算数平均值是不是(5r)/2,条件一,(记不清了),条件二,x+y+r=6r
107. 有一道图形题,回头我画出来。问角y和角x的关系,我的答案是y=3x。
108.1/2+1/2^2+1/2^3+1/2^4+~ ~+1/2^10的范围是:
a. 0~1/2,b.,c.1~3/2,d. 3/2~2,e. 2~3
109. x^2+6x+q, what is the value of q?
1). X^2+6x+q=x^2+rx+r-2. some r is satisfied for this quotation. All variable X
is satisfied for this
2). x^2+6x=Q=(x+m)(x+n), some m and n is satisfied for this quotation. All
variable X is satisfied for this
110. M(0,3)是一直角三角形的顶点,一条边与X轴交于(-4,0),求另一条边与X轴的交点的坐标。(9/4,0)
111.已知a、b是大于2的不同质数,问以下哪个有可能是质数
ab
a+b
a^2+b^2 (记得不是很清楚了)
a^2+2b
a+b+1
112.老机经cinema ticket那道题
113.Senior/physics那道老机经,但是问题不太一样。我算出来是33.3%,不是老机经的50%
114. 第一道题,问0.6是0.0015的多少倍。
115. 下列哪个数可能是1/n-1/(n+1)的值,n为integer。我选1/30
116. wholesale那道老机经。Wholesale price is $90, sell as 10% discount of the retail
price and earn 20% profits. What’s the retailer price?
117. Ds: t为(r-s)的算数平方根,t、r、s为integar。条件一r小于9,条件二t大于1
118. Ds:问(3^4n)+1被10整除余数是否为0。条件一,n=2m+1,m为positive integer;条件二,n大于4
119. 已知(x+1)^2的 units digit为1,(x+3)^2的units digit也为1,问(x-3)^2的digit units是多少?
120. 老机经,12个笔,3个defective,任意取3支,neither is defective 的组合有多少?
121. 老机经,ds: 问n有几个不同质数因子。
条件一,n是7200的因子,
条件二,180是n的因子。
122. DS:有图,梯形ABCD,其中AB平行于CD,CD等于BC,E是CD上的一点,角BCD为直角。问梯形ABCD的面积,条件一AB=10,条件二BE=6。
123. 一数列为1/91, 1/92, …. 1/99, 1/100,问其和的范围
124.
DS:有一数列满足,x在数列中,则-x也在该数量中;x、y在数列中,xy也在该数列中。问12是否在该数列中。条件一,2在该数列中;条件二,6在该数列中。
125. DS:已知数列的第一项,问能否得出数列的第10项。条件一,Xi=ai (这个条件记得不是很清楚);条件二,Xi=(Xi-1)+i
126. DS:问x+y的算数平均值是不是(5r)/2,条件一,(记不清了),条件二,x+y+r=6r
127. 有一道图形题,回头我画出来。问角y和角x的关系,我的答案是y=3x。
128. PS (1/2)/(1/4+1/8) 我的第一题
129. PS 330的因子的差 的 最大值 ( 我的最后一题)
我选 8, 不知对否.
130. DS 50 books was stacked by 7, 1 left, 问 How many books?
1) stacked by 9, 7 left
2) stacked by 4, 3 left
My answer is A, 不知对否.
131.(1/2)/(1/4+1/8)
132. xy=p, p is a prime number, how to
express\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"x+y\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
in terms of p?
133. 1 1) the number of its hundred digit is 0
2) the number of its tenth digit is larger than x
134. 两条线平行与水平直线叫两个角,另外一条直线把其中一个角分成两个小角,知道一个小角的角度,和大角的角度,是否知另一角角度。D
135.细菌繁殖 是个三排四列的图表 只要记得是左边的与上边的一一对应相乘就可以了
136.老机井:少于50本书被9除余一,问总本数那道 A
137.从每个学生从ABCDEFGH中选三个数(ABC与CBA不一样)还剩36中选法,问学生个数
138. 老机井:100克水果99%含水那道
139. 老机井:五边形知道其中四个边长问第五个边可能长度
140.第二项开始是前面一项的两倍加5, 如果第三项是31 第一项是几. 答案4.
141.. 画了一个不是直角的三角型,给了AB=3,AC=4, 问面积. 1). 角BAC是90度. 2)BC=5. 我选D.
142. 给了方差的定义,求几个数的方差.不难.
143.12月的 202题.
我的理解原题的意思是说LEA把帐单上的每一笔帐四舍五入到$1,问这样加起来的结果和实际的总和之差是不是在$8以内.1)每个电话都少于$7.75. 2)
一共有14个电话. 我选了E. 因为不知道每个电话是舍还是入就无法知道结果差多少.我数学没有满分,所以也不知道这题对不对.
144. 我最气的一题就是水果100POUND有99%是水,蒸发过以后是98%,问重量是多少的那题.
我看机经的时候明明自己就会做的.考试的时候竟然呆掉,完全想不起来怎么做了,只好乱选了一个.
145. 1+2+6+24的和写成质数相成的形式,这几个质数的和是多少. 14.
146. 小朋友拿铅笔和钢笔的那题. 1.8
147. 如果一个单子的书价在15元以内,运费3元,超过15元,运费为书价的20%.
问A单和B单加起来的运费是多少.1)两个单子加起来书价是$17.80(反正17块多). 2).每个单子的书价都不少于$4.5. 我选C.
148. 有个很简单的组合题. 绿的红的选3个红的.
149. 从一个好象是8个元素的集合里挑3个元素编成号码分给同学,每人一个,不重复,剩了36个,问有多少个同学.
150. XY>X^2Y^2? 1)14X^2=3. 2)Y^2=1. 我好象选的E.
151. X,M,P为正整数,X
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