解析 意思大概是,有多少个能被7整除的3位数,共128个,做法是,最小能被7整除的三位数是105,最大994,从105到994共890个数字,除以7等于127余点东西,所以是128个 结果一 题目 How many 3-digit numbers are divisible by 答案 意思大概是,有多少个能被7整除的3位数,共128个,做法是,最小能被7整除的三位数是105,最大99...
How many two -digit numbers are divisible by 3? View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparation and CBSE, UP Board, Bihar Board, ...
How many three-digit numbers are there that have the sum of their digits equal to 7?相关知识点: 试题来源: 解析 28. First of all, we can list out the ways to rewrite 7 as the sum of three numbers: 7=0+0+7=0+1+6=0+2+5=0+3+4 =1+1+5=1+2+4=1+3+3=2+2+3 Different...
[translate] a心跳动的旋律,很奇妙的感觉 The heart beats melody, very marvelous feeling [translate] a敖包 Mongolian cairn [translate] aHow many 3-digit numbers contain at least one 7? 多少个3数字数字包含一至少7 ? [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 ...
How many 3-digit numbers are formed by the digits 2,3,5,6,7 and 9, such as to be divided by 5 and having no digit repeat?Fundamental Theorem of Multiplication:The fundamental theorem of multiplication is important in calculating the nu...
These three digit numbers are of the form xyx. We see that x≠0 and x≠5, as x=0 does not yield a three−digit integer and x=5 yields a number divisible by 5. The second condition is that the sum 2x+y<20. When x is 1, 2, 3, or 4, y can be any digit from 0 to 9...
To find how many three-digit numbers can be formed with no repeated digits, we can break the problem down into steps based on the placement of the digits.1. Identify the Structure of a Three-Digit Number: A three-digit numbe
If the middle digit is the average of the first and last digits, twice the middle digit must be equal to the sum of the first and last digits. Doing some casework: If the middle digit is , possible numbers range from to . So there are numbers in this case. If the middle digit is...
How many three-digit numbers could be formed out of 2, 7 and 5 such that at least one figure is used for at least twice? 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册 KMF 解析 网友解析 题目数据 收起 暂无解析 · 相关考点 6.4.1 古典概率 6.3.4 排列 以上解析由 考满分...
(c) How many are greater than 330? How many 8-digit numbers can be formed with the digits 3, 5, and 7? 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 numbe...