1.If n=pqr, where p,q, and r are three different positive prime numbers, how many different positive divisors does n have, including 1 and n?
A.3
B.5
C.6
D.7
E.8
答案：E
2.11*13*17*19*23
A decrease of 1 in which of the factors above would result in the GREatest decrease in the product?
A.11
B.13
C.17
D.19
E.23
答案：A
3.Which of the following numbers is not the sum of three consecutive odd integers?
A.15
B.75
C.123
D.297
E.313
答案：E
4.A dresser drawer contains 15 garments. If 40 percent of those garments are blouses, how many are not blouses?
A.6
B.8
C.9
D.10
E.12
答案：C
5.If a certain company purchased its computer terminals for a total of $540,400 and each of the terminals was purchased for $350, how many terminals did the company purchase?
A.1,624
B.1,544
C.1,434
D.1,384
E.1,264
答案：B
6.At College C there are from 2 to 4 introductory philosophy classes each semester, and each of these classes has from 20 to 30 students enrolled. If one semester 10 percent of the students enrolled in introductory philosophy failed, what is the greatest possible number who failed?
A.12
B.10
C.8
D.6
E.3
答案：A
7.A school district has 1989 computers, which is approximately one computer for every 68.6 students. Of the following, which is the closest approximation, in thousands, of the number of students in the school district?
A.30
B.120
C.140
D.160
E.200
答案：C
8.If the sum of five consecutive even integers is 70, what is the value of the greatest of the five integers.
A.12
B.14
C.18
D.20
E.22
答案：C
9.The sum of the first 50 positive integers is 1275. What is the sum of the integers from 51 to 100, inclusive?
A.2525
B.2550
C.325
D.3775
E.5050
答案：D
10.The numbers in a table are arranged in 10 rows and 4 columns such that one number is placed at the intersection of each row and column. How many numbers are contained in the table、
A.14
B.40
C.400
D.104
E.410
答案：B
11.In how many of the integers between 1 and 100 does the digit 5 occur exactly once?
A.10
B.18
C.19
D.20
E.21
答案：B
