So the total number of threedigit numbers that satisfy the property is . Alternatively, we could note that the middle digit is uniquely defined by the first and third digits since it is half of their sum. This also means that the sum of the first and third digits must be even. Since ...
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...
Find the number of 3-digit numbers, formed with the digit (2,5,4,6) when repetition of the digits is allowed.
Find the number of 6-digit numbers of the form ababab (in base 10) each of which is a product of exactly 6distinct primes. View Solution The total number of 3-digit numbers, whose sum of digits is 10, is View Solution Knowledge Check The sum of all the 3 digit numbers is A98901...
1What 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? A. 12 B. 10 C. 8 D. 6 E. 1 2What is the total number of different 5-digitnumbers that contain all of ...
计算由奇数数字组成的3位正整数的数量N,并与125(Quantity B)比较。 **步骤拆解** 1. **确定条件**: - 三位数的百位不能为0,且所有位(百位、十位、个位)均为奇数数字(即1, 3, 5, 7, 9)。 2. **计算每一位置的选项**: - **百位**:可选的奇数为5种(1, 3, 5, 7, 9)。
natural numbers, such that the first natural number plus 5, the second natural number minus 5, the third natural number multiplied by 5, the fourth natural number divided by five, are all equal. Then the sum of all the three-digit numbers satisfying the above conditions is ( ). ...
Answer to: The units digit of a three-digit number is prime. The hundreds digit is twice the tens digit. How many of these three-digit numbers are...
There are (35)2 cdot 30 leaves on a tree. What is the total number of leaves on the tree? There are (3^5)^2 - 3^0 leaves on a tree. What is the total number of leaves on the tree? On the first day of vacation, you read one-third of novel. On...
Total number of 6 digits numbers in which only and all the four digits 1, 2, 3, 4 appear, is: A13(6!3!) B17(6!3!) C11(6!3!) D19(6!3!)Submit Total number of 6-digit numbers in which all the odd digits appear, is A52×6! B6! C12×6! Dnone of theseSubmit Total num...