单选题1, 2, 6, 7, 9A three-digit integer is to be formed from the digits listed above. If the first digit must be odd, either the second or the third digit must be 2, and no digit may be repeated, how many such integers are possible?A 6B 9C 18D 24E 30

题目
单选题
1, 2, 6, 7, 9A three-digit integer is to be formed from the digits listed above. If the first digit must be odd, either the second or the third digit must be 2, and no digit may be repeated, how many such integers are possible?
A

6

B

9

C

18

D

24

E

30

相似考题

1.There are still many things to straighten out before we can build this factory. First, there is the problem of money. Second, we need to import some of the key equipment. Third, we must set up a strong team to run the factory.()此题为判断题(对，错)。

2.阅读以下说明，回答问题1～4，将解答填入对应的解答栏内。[说明] 输入1个长整型，求各位数字的平方和。例如：输入-123，输出14。include ＜stdio. h＞void main( ){ int digit;long in , s;seanf(" % Id", &in );(1);(2);while(in ＞0) {(3);s = s + digit* digit;(4);}pfinff( "sum = % 1dn", s );}

3.is a sequence of letters and digits, the first character must be a letter.A．An identifierB．A stringC．An arrayD．program

4.设有一个判断语句if(!(ch＞='0'&&ch＜='9'))printf(“This is not a digit!\n”);else printf(“This is a digit!\n”);为实现判定一条件覆盖，需要设计的测试用例个数至少应为A) 1B) 2C) 3D) 4A．B．C．D．

更多“单选题1, 2, 6, 7, 9A three-digit integer is to be formed from the digits listed above. If the first digit must be odd, either the second or the third digit must be 2, and no digit may be repeated, how many such integers are possible?A 6B 9C 18D 24E 30”相关问题

  • 第1题：

    单击一次命令按钮之后，在对话框中输入12，2，34，23，窗体中的输出结果为______。 Private Sub Command1_ Click () Dim a(4) As Integer For i = 1 To 4 a (i) = Val (InputBox (“请输入元素”)) Next i plus a(1), a(2), a(3) End Sub Sub plus(first As Integer, second As Integer, third As Integer, Optional forth) n = first + second + third If Not IsMissing (forth) Then n = n + forth End If Print n End Sub

    A．14

    B．71

    C．48

    D．37


    正确答案：C

  • 第2题：

    3．—__________ 1 go out for a while?

    —No，you __________ You must finish your homework first．

    A． Must，needn't

    B． Can，may

    C． May，mustn't

    D． May，must


    正确答案：C

  • 第3题：

    How does the Extended Get Digit String step differ from the Get Digit String? （）

    • A、It can be used in conjunction with another step. 
    • B、It allows the application programmer into another section of the application. 
    • C、Most of the Extended Get Digit String variables can be changed while the application is running. 
    • D、It allows the entry of a Boolean expression for the Interruptible and Clear DTMF Buffer on Retry fields.

    正确答案:C,D

  • 第4题：

    Digit analysis得到的Destination有两种类型：（）和SPR。


    正确答案:ROU

  • 第5题：

    Which step is designed to prompt a user to press or say a single-digit number to perform a specific function? （）

    • A、Menu  
    • B、Get Digit String  
    • C、Get Call Contact Info  
    • D、Extended Get Digit String

    正确答案:A

  • 第6题：

    单选题
    How many different four-digit integers can be formed using the digits 3, 4, 5, 6, 7, 8, 9 if the tens digit is 5 and no digit is repeated within an integer?
    A

    16

    B

    45

    C

    63

    D

    120

    E

    840


    正确答案： A
    解析：
    首先需要想一下每个位置有几种选择，然后将这些选择相城可得出结果。因为十位数上数字已经确认定，所以只能有一种选择，又因为一个数中3, 4, 5, 6, 7, 8, 9不能重复，个位上有6中选择，那么百位上和千位上则分别有5种和4种选择，故总的可能为4×5×1×6=120种。

  • 第7题：

    单选题
    How many positive 3-digit integers contain only odd digits?
    A

    15

    B

    75

    C

    125

    D

    225

    E

    500


    正确答案： C
    解析：
    根据题干可知三位数可以从1,3,5,7,9中选出。因为3位数字可以独立的选择，所以三位数字可为5×5×5=125，故选C。

  • 第8题：

    单选题
    If 7y+9 represents an odd integer, which of the following represents the next smaller odd integer?
    A

    7(y+1)

    B

    7(y-2)

    C

    7(y+3)

    D

    7(y+2)

    E

    7(y-2)+1


    正确答案： A
    解析：
    根据奇整数的排列顺序特点，相邻两奇整数之差为2，因此比7y+9小的相邻奇整数为(7y+9)-2=7y+7=7(y+1)。

  • 第9题：

    单选题
    If the average of the two-digit numbers 1N, N7, and NN is 35, then N= ______.
    A

    2

    B

    3

    C

    4

    D

    5

    E

    6


    正确答案： A
    解析：
    If the average of the two-digit numbers 1N, N7, and NN is 35, then the sum of the three numbers is 3×35 or 105. Since 1N+N7+NN = 105, look for a value of N in the set of answer choices such that N+7+N is 15 or 25. For choice C., N = 4, 14+47+44 = 105

  • 第10题：

    多选题
    The air waybill number is the identification of each consignment and comprises three parts（）.
    A

    the main portion identifying the consignment

    B

    a three-digit prefix identifying the carrier

    C

    the main portion identifying the carrier

    D

    the last check digit for accounting and security purposes


    正确答案： D,B
    解析： 暂无解析

  • 第11题：

    单选题
    When you ______ to access your account, you need to enter your four-digit password.
    A

    want

    B

    will want

    C

    wanted

    D

    wanting


    正确答案： C
    解析：
    句意：进入账户时需要输入四位数密码。主句句中使用一般现在时叙述一般性事实，从句也用一般现在时。选择A。

  • 第12题：

    多选题
    How does the Extended Get Digit String step differ from the Get Digit String? （）
    A

    It can be used in conjunction with another step.

    B

    It allows the application programmer into another section of the application.

    C

    Most of the Extended Get Digit String variables can be changed while the application is running.

    D

    It allows the entry of a Boolean expression for the Interruptible and Clear DTMF Buffer on Retry fields.


    正确答案： B,A
    解析： 暂无解析

  • 第13题：

    Refertotheexhibit.TheSt.LegerEmergencyResponseSupplyCompanyhasahome-officeworker,Ms.Oswego,whoisattachedtoitsvoicenetwork.Whichconfigurationcommand,whenaddedtotheconfigurationshownonbothRouterT1andRouterT2wouldallowthoseattachedtoRouterAtobeabletocallMs.Oswego?（）

    A.prefix

    B.num-exp

    C.digit-strip

    D.nodigit-strip

    E.forwarddigits

    F.translation-rule


    参考答案：E

  • 第14题：

    Providing you are not sailing in the Red Sea or another special area as listed in ANNEX V of MARPOL，how many miles from land must you be to throw garbage including bottles，rags，and glass that has not been ground up into the sea?

    A.3 nm

    B.6 nm

    C.12 nm

    D.25 nm


    正确答案：C

  • 第15题：

    D/A（Digit to Analog）转换器的作用是将二进制的（）转换为相应的（）。


    正确答案:数字量；模拟量

  • 第16题：

    The air waybill number is the identification of each consignment and comprises three parts（）.

    • A、the main portion identifying the consignment
    • B、a three-digit prefix identifying the carrier
    • C、the main portion identifying the carrier
    • D、the last check digit for accounting and security purposes

    正确答案:A,B,D

  • 第17题：

    单选题
    In the correctly worked out addition example below, what is the greatest possible value of digit B?
    A

    9

    B

    8

    C

    6

    D

    5

    E

    4


    正确答案： B
    解析：
    Since 2 is carried over from adding the digits in the first column, in the second column A+B+B+1= 14, so A+2B= 13. Since B must be an integer, A cannot be 0. Hence, the greatest possible value of digit B occurs when A = 1 and B = 6.

  • 第18题：

    单选题
    A password is made up of two letters followed by two single-digit numbers. If a person is assigned a password at random, what is the probability, rounded to the nearest hundredth, that the password uses only even digits for the numbers?
    A

    0.25

    B

    0.35

    C

    0.5

    D

    0.15

    E

    0.1


    正确答案： B
    解析：
    There are a total of 26 ×26 ×10 ×10 = 67,600 possible passwords, of which 26 ×26 ×5 ×5 = 16,900 use only even digits. P (even digits)= 16900/67,00==0.25

  • 第19题：

    问答题
    In writing all of the integers from 1 to 300, how many times is the digit 1 used?

    正确答案： 160
    解析：
    可以参考TACTIC8。根据题意，把数位上有1的数值进行系统地列举有：1到99之间，数位上有1的共20个数值，即(1，11，21…，91)和(10，11，2…，19)；相应地，200到299之间，数位上有1的也有20个数值；而100到199之间，数位上有1的除了个位，十位上的，还有百位上的，共有120个数值，所以总数是20+20+20+100=160.

  • 第20题：

    单选题
    If m and n are positive integers and 3m+n-1=2m+2n, which of the following must be true?I. m and n are consecutive integers.II. m is even.III. n is odd.
    A

    None

    B

    I only

    C

    II only

    D

    III only

    E

    I, II, and III


    正确答案： D
    解析：
    Since m=n+1, where m and n are given as positive integers, Roman numeral choice I is true. Since, m=n+1, m can be either odd or even, hence choice II is false. Roman numeral choice III is also false since n can be either even or odd.

  • 第21题：

    单选题
    Providing you are not sailing in the Red Sea or another special area as listed in ANNEX V of MARPOL，how many miles from land must you be to throw garbage including bottles，rags，and glass that has not been ground up into the sea? （）
    A

    3 nm

    B

    6 nm

    C

    12 nm

    D

    25 nm


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    A die whose faces are numbered from l to 6 is rolled. Which of the following statements must be true?Ⅰ. The probability of getting a 4 on the top face is 2/3.Ⅱ. The probability of getting an odd number on the top face is 1/2.Ⅲ. The probability of getting a prime number on the top face is 1/2.
    A

    Ⅰand Ⅱ only

    B

    Ⅱ and Ⅲ only

    C

    Ⅰ and Ⅲ only

    D

    Ⅱ only

    E

    Ⅰ, Ⅱ, and IⅢ


    正确答案： E
    解析：
    There are total six different results when the die is rolled. Since any one of the six numbers many show up on the top face, the probability of getting a 4 on the top face is 1/6. Hence, Roman numeral Ⅰ is not true. Statement Ⅱ is true. Since there are three prime numbers, the probability is 3/6 or 1/2. Hence, Roman numeral Ⅲ is true.

  • 第23题：

    单选题
    Which step is designed to prompt a user to press or say a single-digit number to perform a specific function? （）
    A

    Menu  

    B

    Get Digit String  

    C

    Get Call Contact Info  

    D

    Extended Get Digit String


    正确答案： A
    解析： 暂无解析

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