If the numbers are equal, print the message “These numbers are equal.” Use only the single-selection form of the if statement you learned in this chapter. ANS: 1 /* Exercise 2.18 Solution */ 2 #include 3 4 int main() 5 { 6 int x; /* define first number */ 7 int y; /*...
60. How many 7-digit palindromes (numbers that read the same backward as forward) can be formedusing the digits 2,2,3,3,5,5,5?()(A)6(B)12(C)24(D)36 相关知识点: 试题来源: 解析 60.A解:七位的回文数应是形如abcdcba,很显然d=5。剩下的问题就是abcdcba的前三位abc有几种可能性?
How many 3-digit positive integers are there whose middle digit is equal to the sum of the first and last digits? How many positive three-digit numbers can be made from the digits 4, 5, 6, and 7 if no digit can be used more than once in a given number?
Example 3: Detecting Palindromes You can use infinite sequences in many ways, but one practical use for them is in building palindrome detectors. A palindrome detector will locate all sequences of letters or numbers that are palindromes. These are words or numbers that are read the same forward...
How many bit strings of length 12 contain exactly three 1s? How many bit strings are there of length 6 which contain exactly three 1's? A station is to be assigned a three-letter call sign. if the first letter must be an upper k or upper w...
Example 3: Detecting Palindromes You can use infinite sequences in many ways, but one practical use for them is in building palindrome detectors. A palindrome detector will locate all sequences of letters or numbers that are palindromes. These are words or numbers that are read the same forward...
Given the digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), how many 5 digit numbers can be made with different digits?Fundamental Principle of countingthe fundamental principle of counting gives the total number of ways to do a particular task. ...
How many 3-digit numbers (from 100 to 999) do not contain even digits? (0 is considered an even digit). How many 8-digit numbers can be formed with the digits 3, 5, and 7? How many 3-digit numbers are formed by the digits 2,3,5,6,7 and 9, such as to be divided by...
How many different 6 digit numbers are there which have exactly 2 distinct digits? The first digit cannot be zero. Examples are 888988, 433333, and 767676. How many binary strings of length 8 begin with 10 or have 0 as the third digit? How many 13 bit strings have even ...