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31.一直角三角形，两直角边相加等于12，斜边为10，求该三角形面积。
答案有22，36…… （数不太记得，反正都是整数）
32.说有Y=X^2+C,问是否在第一象限
1）C大于零
2）点（1，2）
33.是否可以知道K=P^r的值？
1）P=1
2)r=1
34.K是三位数，他的个位上是nonzeros 问三为数的TENS是多少
1． K+A 的十位是B
2． K+C 的十位是D
其中ABCD都是0——9的整树具体数值忘记了
35.一个五边行，图在这里很难画，各个角分别是2X 2X 3X2X X 求Y
Y是其中3X的补角
思路就是X+2X+2X+2X+3X=540
X=54 54*3=162
Y=18
36. 有个汽车租赁店，今年买进5辆汽车，卖给拍卖行三辆，今年这个汽车行的汽车拥有数量比去年增加了14%如果买进一辆和卖出一辆算是一个TRANCATION问最多可以几个TRANCATION。
37. XYZ〈0
XY2Z3 是否小于（还是大于忘记了）0
1． Y〈0
2． X〉0
38. 问好象是干吗的就算是买东西吧一共是某个数，A买了某个树，B买了某个数，什么都不买的是什么都买的三倍，求什么都买的
39.N次根号X乘以N次根号的Y两者乘机的N次放
40. 3的负一次方加上1的负一次放，和的倒数
41.某人开车行驶，速度在 20到45之间，行试了4个小时
另一个人行使同样的路程，速度在30-60吧，行使了2个小时
求路程的范围
42.两个数字都在0到9之间问他们的乘机是偶数的概率见8月份机井
43.某个数是1到8（INCLUSIVE）的乘积
=2K3M5J7P 求K+M+J+P
44. A triangle, R is the right angle, PR=RQ=4, 求RQ?
45. 求equation (R+4)*P的值
(1) R+4=0
(2) P=0 46.求1/(根号(n+1)－根号n)?
根号(n+1)+根号n
47. A work performed at constant rate, it needs 4 workers to produce x units in 6 days, and how many workers are needed to produce 3x units in 4 days?
48. A square with points (1,1),(-1,1),(-1,-1)&(1,-1), ask the probability of point P(x,y) within the square where x^2+y^2=1?
49. 求P^r？
(1)P=1
(2)r=1
50. 一线段，依次P.Q.R.S点，已知PS＝20， 求QR
(1) PQ+RS=?
(2) PR=?, QS=?
51. Among the scientists attending the meeting, 80% are dental scientists(具体不记得了，不过只是一个指代，不影响解题), and 75% of these dental scientists are native American, ask the percentage of non-dental scientists who are native American.
(1)The total number of the scientists are 250
(2)The percentage of native Amercians among scientists are 75%
52.一柱形图，分别是93, 94，95，96年retail business的revenue(in billions of dollars), 94年为?95年为10, a store in 94 takes ?% in 1994 and 2.5％in 1995, ask the percentage of increase of the store from 1994 to 1995?
53. [x]表示小于或者等于X的integer, 当x=-5/2时，求[x]?
54.求x (1)X^2>2y
(2)X^3 E
55.j,k,m are from 0~9 inclusive, and T=10j+1000k+100m, 求unit digit of T?
(A)0,(B)1,(C)j,(D)k,(E)m
56.people own computers: IBM: ?人, Apple:85人 , Dell: ?人, Compaq: 77人, 和另外一个什么牌子的?人. Ask at most how many people could own both Apple and Compaq?
57.Pick 6 from 9 different chairs, pick 2 from 3 different tables,ask how many more selections of chairs than those of tables?
58.A series 1/2,1/4,1/8,1/16,1/32, each one is half of the one before, ask the range of the 10th number?
59.The factors of X are the prime factors of 770 and has only one prime factor that is not a factor of 770, ask the least possible ratio of x/770?
60.A plane travels from A to B in 3 hours at an average speed of 400 miles and the next day, it travels at an average speed of 450 miles, ask how many minutes less does it spend the next day? | 
