Editing Divisibility rule (section)

{{short description|Shorthand way of determining whether a given number is divisible by a fixed divisor}}
A '''divisibility rule''' is a shorthand and useful way of determining whether a given [[integer]] is divisible by a fixed [[Divisor (number theory)|divisor]] without performing the division, usually by examining its digits. Although there are divisibility tests for numbers in any [[radix]], or base, and they are all different, this article presents rules and examples only for [[decimal]], or base 10, numbers.  [[Martin Gardner]] explained and popularized these rules in his September 1962 [[Mathematical Games column|"Mathematical Games" column]] in ''[[Scientific American]]''.<ref>{{cite journal |last1=Gardner |first1=Martin |title=Mathematical Games: Tests that show whether a large number can be divided by a number from 2 to 12 |journal=Scientific American |date=September 1962 |volume=207 |issue=3 |pages=232–246 |jstor=24936675|doi=10.1038/scientificamerican0962-232 }}</ref>