31、 求X+5=？
（1）︱Ｘ-5︱=10
（2）︱X︱-5=10
答案:C

32、m positive integer, 问 r is the remainder of 3m/5, r 可能是：
（1） 0
（2） 1
（3） 3
答案:（1）（2）（3）都可以

33、(费费宝典中的题，这个月也出过) 一个车行每次买入车是5辆，每次卖其旧车给折旧店是3辆，每买入和每卖出都算一次交易，该本行去年共增加14辆车，问最少交易次数。
答案:6

34、测量一个东东的重量，mean是47.8 ounce, 其一个标准差是0.5once, 问下面哪一个重量是在3个标准差之内。
答案:题目不完整

35、一个厂家有7500个东东，每个cost 是20$, 卖出时其中 2/3卖价是double cost, 另 1/3是25 percent higher than cost, 求profit.
答案:20*5000+2500*5

36、一个平行四边形，每条边均相等，边长为6， 面积为18，求其中一个角
答案:30

37、一个平行四边形，其中两个角，每个均为60度，求另外两个角中每一个是多少度
答案:120

38、2^x>75?
(1) 3^x>50
(2) (2^x)(3^x)> 1500
答案:E

39、x+y=3, 3x+4y/4x+3y=1, 求x-2y=?
答案:-1.5

40、x-3, x-2, 1.5, x, x+1.5，x>0, 其mean 是x, 求x.
答案:-2

41、某病用某种方法检测，有该病检查结果呈现positive (阳性)，无该病检查结果呈现阴性（negative），问检查结果的准确性。
（1）有该病的人中1/8的检查出来呈阳性
（2）90%的人检查呈阴性
答案:E

42、某人行车，每秒速度为r, 如果速度为r+20的话，则省是4分钟，问r ？
答案:题目不完整,没有路程

43.三个三角形放在一起，有公共边，比较几个角的大小。共同边长为5，6，另外一边分别为7，8，9，求最大角是哪一个。
答案:没有图,如果是比较所有三角形内角的大小则很明显是三边为5,6,9的那个中的边9对着的那个角

44. two kinds of machines x and y , x costs p dollars for each set , y q dollars . what is the total amount spent on 5 sets of x and 4 sets of y?
1) 4 sets of x and 3 sets of y cost 2180 dollars .
2) 10 sets of x and 3 sets of y cost 3250 dollars.
答案:C

45. 5^k is a factor of the product of odd integers from 99 -199 , what is the greatest possible value of k ?
答案:13

46. a bouquet¹ consists of red and white carnations² , randomly³ select two flowers , what is possibility of having one of each ?
1) the number of red carnations is equal to that of the white carnations
2) there are 6 red carnations in the bouquet.
答案:C

47. when positive integer a is divided by another positive integer b , the quotient is 5 and remainder is 3 , which of the following could be the value of a ?
1 ) 13 2) 38 3) 57
答案:13,38

48. line k and l intersect at point ( 16/5, 12/5 ) , what is the slope of line l
1) one of the angles formed at the intersection⁴ is 90
2) line k passes through the origin
答案:C

49. is 1000 a factor of k ?
1) 2000 is a factor of 4k
2) 8 is a factor of k
答案:C

50. if lm+4l=2, what is the value of m?
1) m<0
2) m^2 +8m + 12=0
答案: 题目本来很容易,不过不理解lm+4l=2是什么意思?

51. is the total measure of interior angles in polygon p greater than 500 ?
1) the measure of one angle is 100
2) the polygon has more than 5 sides.
答案:B

52. if x@y =xy -x+y , a@b=0, what is a in terms of b ?
答案:ab-a+b=0
所以a(b-1)=-b
a=b/(1-b)

53. f(y)=ky, k is a constant , is f(-5)>0?
1) f(-2) <0
2) f(-3)f(-4)>0
答案:A

54 do jack⁵ and nancy together own a total of 10 pencils ?
1) jack owns more than twice the pencils owned by nancy
2) nancy owns less than 5 pencils .
答案:E

55. are m and k consecutive⁶ numbers ?
1) m+k=3
2) m-k =1
答案:B

56.x,y,z are three sides of a triangle , and xA y> 2^(1/2) B (1/2)*3^(1/2) D (1/4)*3^(1/2)
答案:题意不明确

57. 一个直角三角形，面积为1， 边长c
答案：b>根号2
bc=2 and b>c so b>根号2

58. 一个长方形，长10宽8，套上一个宽度相同的框，这个框的面积是144，求框的宽。
答案：3
2*(10+2X) + 2*8X =144

59. the range of the monthly salary in 1999 is 240, the range of the monthly salary in 2000 is 320, ask what is the minimal⁷ range of the monthly salary in both 1999 and 2000.
A: 80
B: 240
C 320
D: ***
E: ***
答案:320

60.从12个红球和12个兰球里选2个， 全是红的概率：
答案:C12,2/C24,2