divisibility rule造句

Edits on mathematical subjects, particularly Divisibility rule and its talk page, and user pages particularly and his talk page.
:I can't answer the bolded question, but you'd probably be interested in Divisibility rule and the general way to determine these properties.
The sum of the digits 0 to 9 is 45, passing the divisibility rule for both 3 and 9 . The first base 10 pandigital prime is 10123457689; lists more.
:See our article on divisibility rules, which includes this rule ( yes, it is an " if and only if " rule ) and gives an explanation if you go far enough down the article.
What this procedure does, as explained above for most divisibility rules, is simply subtract little by little multiples of 7 from the original number until reaching a number that is small enough for us to remember whether it is a multiple of 7.
It's difficult to find divisibility rule in a sentence. 用divisibility rule造句挺难的

Edit warring to restore an edit previously made by a known sock [ https : / / en . wikipedia . org / w / index . php ? title = Divisibility _ rule & diff = 708997511 & oldid = 708997178 to Divisibility rule.
Since ( see divisibility rule for a refresher ) 2135 is not divisible by 2, it is not divisible by 4; since 2 + 1 + 3 + 5 = 11 and it is not divisible by 3 ( 11 is not divisible by 3 ), it is not divisible by 15.
If you reverse the digits, it will not be divisible by 9 . If you add the digits up ( recursively until there is only 1 number left ), it will not be 9 . See divisibility rule for more .-- & trade; 17 : 55, 21 October 2010 ( UTC)
In arithmetic, for example, when multiplying by 9, using the divisibility rule for 9 to verify that the sum of digits of the result is divisible by 9 is a sanity test it will not catch " every " multiplication error, however it's a quick and simple method to discover " many " possible errors.