已选分类
管理学
1单选题Ajarcontainsonlyxblackballsandywhiteballs.Oneballisdrawnrandomlyfromthejarandisnotreplaced.Asecondballisthendrawnrandomlyfromthejar.Whatistheprobabilitythatthefirstballdrawnisblackandthesecondballdrawniswhite?
2单选题If k is an integer greater than 44 and less than 51，then which of the following could be the product of 11 and k? (A) 565 (B) 550 (C) 500 (D) 484 (E) 440
3单选题If x and y are prime numbers, which of the following CANNOT be the sum of x and y? (A) 5 (B) 9 (C) 13 (D) 16 (E) 23
4单选题Xavier,Yvonne,andZeldaeachtryindependentlytosolveaproblem.Iftheirindividualprobabilitiesforsuccessareand,respectively,whatistheprobabilitythatXavierandYvonne,butnotZelda,willsolvetheproblem?
5单选题How many three-digit numerals begin with a digit that represents a prime number and end with a digit that represents a prime number? (A) 16 (B) 80 (C) 160 (D) 180 (E) 240
6单选题Anydecimalthathasonlyafinitenumberofnonzerodigitsisaterminatingdecimal.Forexample,24,0.82,and5.096arethreeterminatingdecimals.Ifrandsarepositiveintegersandtheratioisexpressedasadecimal,isaterminatingdecimal?(1)90＜r＜100(2)s=4
7单选题If x is the product of three consecutive positive integers, which of the following must be true? Ⅰ. x is an integer multiple of 3. Ⅱ. x is an integer multiple of 4. Ⅲ. x is an integer multiple of 6.
8单选题How many positive prime numbers are less than the integer n? (1)14＜n＜20 (2)13＜n＜17 (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
9单选题Intheadditionproblemabove,thenumber□mustbe(A)5(B)6(C)7(D)8(E)9
10单选题When the integer n is divided by 6, the remainder is 3. Which of the following is NOT a multiple of 6? (A) n-3 (B) T+3 (C) 2n (D) 3n (E) 4n
11单选题A company that ships boxes to a total of 12 distribution centers uses color coding to identify each center. If either a single color or a pair of two different colors is chosen to represent each center and if each center is uniquely represented by that choice of one or two colors, what is the minimum number of colors needed for the coding? (Assume that the order of the colors in a pair does not matter.) (A) 4 (B) 5 (C) 6 (D) 12 (E) 24
12单选题How many positive integers k are there such that 100k is a factor of (22)(3)(53)?
13单选题How many three-digit numerals begin with a digit that represents a prime number and end with a digit that represents a prime number?
14单选题If P is a set of integers and 3 is in P, is every positive multiple of 3 in P? (1)If x is in P，then x+3 is in P. (2)If x is in p, then x-3 is in p.
15单选题In an office, 40 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 1 0 years of service?
16单选题If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n? (1)n is the cube of an integer. (2)n is even. (A) 条件(1)充分，但条件(2)不充分． (B) 条件(2)充分，但条件(1)不充分． (C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分． (D) 条件(1)充分，条件(2)也充分． (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
17单选题Ifwhenacertainmtegerxisdividedby5theremainderis2,theneachofthefollowingcouldalsobeaninteger
18单选题How many integers 72 greater than 10 and less than 100 are there such that, if the digits of n are reversed, the resulting integer is n+9? (A) 5 (B) 6 (C) 7 (D) 8 (E) 9
19单选题Coins are to be put into 7 pockets so that each pocket contains at least one coin. At most 3 of the pockets are to contain the same number of coins, and no two of the remaining pockets are tO contain an equal number of coins. What is the least possible number of coins needed for the pockets?
20单选题 CREATE YUUR OWN SUNDAE 12 Ice Cream Flavors 10 Kind of Candies 8 Liquid Toppings 5 Kinds of Toppings With or Without Whipped cream If a customer makes exactly one selection from each of the five categories shown in the table above, what is the greatest possible number of different ice cream sundaes that a customer can create?