How many 3-digit numbers are there so that the sum of its digits is 5?有多少个三位数的各个数字之和是5? 答案 15个.各个数字之和为5,百位是1的三位数有104、113、122、131、140;百位是3的三位数有203、212、221、230;百位是3的三位数有302、311、320;百位是4的三位数有401、410;百位是5的三位...
How many 3 digit number(s) is/are that can be divisible by 7 or 11 but not divisible by 13? 能被7或11整除而不能被13整除的三位数有多少个? 相关知识点: 试题来源: 解析 183. 7×13=91,11×13=143,7×11=77, 7:105,112,⋯,994, 11:110,121,⋯,990, 77:154,231,⋯,924,...
百度试题 结果1 题目How many 3 digits numbers have exactly one digit 5 in them?ji 相关知识点: 试题来源: 解析 既然是3位数字,那么考虑区间就是100-999情况1,有一个5:9*9=81个情况2,有两个5:9+9=18个情况3,有三个5:1个总共:100个 反馈 收藏 ...
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...
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 相关推荐 1 How many 3-digit numbers are divisible by ...
百度试题 结果1 题目How many three-digit whole numbers are there such that the digit sum is ? A. 2 B. 4 C. 6 D. 8 E. 10 相关知识点: 试题来源: 解析 E, , , , , , , , , 总共有10个 反馈 收藏
How many 3-digit even number(s) with distinct digits is/ are there?问有多少个数位皆不同的三位偶数?
67.How many3-digit numbers satisfy(满足)the property that the middle digit is the average of thefirst and the last digits?((A)42(B)43(C)44(D)4567.How many 3-digit numbers satisfy(满足)the property that the middle digit is the average of the first and the last digits? () (A)42...
百度试题 结果1 题目【题目】How many 3-digit number(s) is/are there such thatthe number does not contain digit "O" or "1"?有多少个不包含数位0或1的三位数? 相关知识点: 试题来源: 解析 【解析】512. 反馈 收藏
How many 3-digit positive intergers are odd and do not contain the digit 怎么算?请指教 相关知识点: 试题来源: 解析 先排除5所有可能在的地方 第一个数字可以是1,2,3,4,6,7,8,9里的任何数字.因此,有8种不同的方式来选择第一个数字. 第二位可以是0,1,2,3,4,6,7,8,9里的任何一个.因此,...