Step by step video, text & image solution for Find the number of 7 - digit numbers that can be formed using 2,2,2,3,3,4,4. by Maths experts to help you in doubts & scoring excellent marks in Class 12 exams.Updated on:21/07/2023 ...
结果1 题目 12. Find the number of 6-digit numbers using the digits 3,4,5,6,7,8 without repetition.How many of these numbers are(a)divisible by 5, (b) not divisible by 5. 相关知识点: 试题来源: 解析 720a) 120 ,b) 600 反馈 收藏 ...
If the product of all digits of a six-digit number is ,among such six-digit numbers,the smallest is . 相关知识点: 试题来源: 解析 1. 翻译如下: 一个六位数的各位数字的乘积为,这样的六位数中,最小的是多少? 解答如下: 将分解质因数,得, 所以,这个六位数最小为.反馈 收藏 ...
Find the number of three-digit numbers possible if only the digits 0,1,2,3,4and5 may be used,the number must be a multiple of 5,and no digit may be used more than twice in the same number 相关知识点: 试题来源: 解析 一个三位数,只能由0,1,2,3,4,5来组成,它必须是5的倍数,这个...
(5)Whatcountriesuse11-digitmobilephonenumbersnow?China,Britain and Japan. 相关知识点: 试题来源: 解析 (1)细节理解题。根据第二段Thefourthtotheseventhdigitstellyouwherethenumberisregistered(注册).(第4到7位数字告诉你号码在哪里被注册。)可知,第4到7位数字告诉你号码在哪里被注册。故填wherethenumber...
We once had 10-digit numbers.B. Your number has eleven digits.C. But short numbers are easy to remember.答案速查D. The 11 digits can be divided into three parts.51~55 BDAFEE. So they can't create as many numbers as we can.F. That's enough for each of us to use 7 or 8 ...
Assume every 7-digit whole number is a possible telephone number except those that begin with 0 or 1. What fraction of telephone numbers begin with 9 and end with 0? (Note: All telephone numbers are 7-digit whole numbers( ).A.B.C.D.E. 答案 B相关推荐 1Assume every 7-digit whole nu...
【题目】Assume every 7-digit whole number is a possible telephone number except those that begin with o or 1. What fraction of telephone numbersbegin with s and end with o? (Note: All telephone numbers are 7-digit whole numbersA.1/(63) B.180C.1/(81) D.11/(90) E1/(100) 相关...
Because Britain and Japan also use 11-digit mobile phone numbers.(2)Because we have the largest population in the world.(3)在中国每个人使用七八个手机号,那是足够的。(4)如果你拨打很长一段时间不联系的号码,你可能发现它的主人已经更换。(5)Mobile Phone Numbers ...
We can use 7 and 9 or 8 and 8. There are three such numbers: 879, 897, and 888. If the first digit is 9, the other two digits add to 15. There are four such numbers: 969, 996, 987, and 978. The total number of counting numbers for which the digit sum is 24 is 1+2+3...