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，这个数中每个数字使用不能超过2次。这样的数有几个？必须是5的倍数，说明最后一位只能是0或5.第一位数可以是1-5中任意一个，第二位数可以是0-5中任意一个，第三位数是0或者5.概率是5 x 6 x 2 = 60 因为每个数不能用两...
What is the total number of different 5-digitnumbers that contain all of the digits 2,3,4,7 and 9 and in which none of the odd digits occur next to each other A. 12 B. 10 C. 8D. 6 E. 1 相关知识点: 试题来源: 解析 A 含有2,3,4,7和9这5个不同数字,且奇数相邻的5位数(...
百度试题 结果1 题目10 Find the sum of all three digit numbers that are multiples of 14 but not 21. 相关知识点: 试题来源: 解析 24192 反馈 收藏
3 There are some three-digit numbers. The sum of the three digits of each number is 24. How many such three-digit numbers are there in total? Putting the three-digit numbers that satisfy the condition in order from the greatest to the least, what is the fourth number? 相关知识点: ...
30.What is the total number of different 5-digit numbers that contain all of the digits 2,3,4,7,and 9 and in which none of the odd digits occur next to each other? answer:12 翻译并做谢谢(不要用机器)相关知识点: 试题来源: 解析...
故选C.结果一 题目 A 4-digit whole number is the sum of at most( )3-digit whole numbers.A.10B.19C.99D.100 答案 C相关推荐 1A 4-digit whole number is the sum of at most( )3-digit whole numbers.A.10B.19C.99D.100 反馈 收藏 ...
结果一 题目 N equals the number of positive 3-digit numbers that contain odd digits only. 答案 N等于只包含奇数的正的3D数字的数量 相关推荐 1 N equals the number of positive 3-digit numbers that contain odd digits only. 反馈 收藏
C(3,2)*C(9,1)，最后一个空八个数里选一个C(8,1)，合起来就是C(3,2)*C(9,1)*C(8,...
百度试题 结果1 题目How many three-digit whole numbers are there such that the digit sum is 24? A. 2 B. 4 C. 6 D. 8 E. 10 相关知识点: 试题来源: 解析 E 699, 969, 996, 789, 798, 879, 897, 978, 987, 888总共有10个反馈 收藏 ...
百度试题 结果1 题目Find the number of the 3-digit positive numbers that any of its digits are not 5 but divisible by 5. 求所有三位正整数的数量使得它的任何位值都不是5,但能被5整除. 相关知识点: 试题来源: 解析 72. 反馈 收藏