How many 4-digit numbers, which is divisible by 33, can be formed by using 1, 2, 3, 4, 5 and 6 with no repeating digits?相关知识点: 试题来源: 解析 16. 设该四位数为 ¯¯¯¯¯¯¯¯¯¯abcd, 若¯¯¯¯¯¯¯¯¯¯abcd 能被33整除, 即a+c=b+...
Michal Krfzek and Jan Chleboun, Is any composite Fermat number divisible by the factor 5h2’’1 + 1, Tatra Mt. Math. Publ., 11(1997) 17–21; MR 98j: 1 1003. Google Scholar Michal Kffzek and Lawrence Somer, A necessary and sufficient condition for the primality of Fermat numbers,...
1. Determine all three-digit numbers N having the property that N is divisible by 11, andN/(11)is equal to the sum of the squares of the digits of N.(BGR)1.求出所有的三位数,使得这个三位数除以11所得的商是它各位数字的平方和(保加利亚) ...
Consecutive numbers divisible by consecutive squares.A letter to the editor is presented in response to Abbas Rouholamini's examples of three consecutive numbers which are divisible by squares in the vol. 43, no. 3 issue.EBSCO_AspMathematical Spectrum...
This means that n cannot in fact be divided by 2.How to quickly check if a given number is odd? Again, we saw in divisibility rules that a number is divisible by 2 or gives a remainder of zero if its last digit is 0,2,4,6,or 8....
The best approach to solving this problem is to find one number that is divisible by both 3 and 8, and then determine which of the answer choices also goes into that number. When you multiply 3 times 8, you get 24, which means that 24 is one number that is divisible by both 3 and...
To determine if the number 121,212 is divisible by 3, we can follow these steps:Step 1: Identify the digits of the number The number we are examining is 121,212. The digits of this number are 1, 2, 1, 2, 1, and 2.
A number divisible by 8(such as 8)may not be divisible by 6, but is divisible by 1,2, and 4. 下列哪个数字不能被8整除( ). A.6 B.4 C.2 D.1 可以被8整除的数字(例如8)可能不能被6整除,但是可以被1,2和4整除, 故选A.反馈
Solution:Even numbers are divisible by 2. Counting numbers less than 10: 1, 2, 3, 4, 5, 6, 7, 8, 9 So, even numbers less than 10: 2, 4, 6, 8 Example 4. In the figure below, observe the pattern and find the number of dots in the fourth box. ...
For example 1729 ( 19*91) is divisible by 1+7+2+9 =19, so 1729 is a Harshad number. Harshad Triangular Number can be defined as the Triangular numbers which are divisible by the sum of their digits. For example, Triangular number 1128 is divisible by 1+1+2+8 = 12 (i.e. ...