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...
4. Calculate the total combinations: - The total number of three-digit odd numbers that can be formed is calculated by multiplying the number of choices for each digit: Total=(Choices for last digit)×(Choices for first digit)×(Choices for second digit)=3×6×6=108 Final Answers:- When...
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 ...
Divide a three-digit number into 4 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...
题目 Find the sum of all the three-digit numbers divisible by 7.A 10048B 70336C 10153D 71071 相关知识点: 试题来源: 解析B 首先确定三位数的范围是100到999。能被7整除的最小的三位数是105(7×15),最大的是994(7×142)。这些数构成等差数列,首项a₁=105,末项aₙ=994,公差d=7。
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...
1. Suppose repetitions are not allowed (a) Find the number n of three-digit numbers that can be formed from the six digits: 2,3,5,6,7,9. (b) How many of them are even? (C) How many of them excee How many 3-digit numbers are formed by the...
C. all three digits are alike.We need to calculate B. B=Total - A - CTotal numbers from ...