Divisibility rule of 7: The Divisibility Rule of

The Divisibility Rule of 7 is an ancient rule of thumb to determine whether a number can be divided by 7 . This article provides the mathematical proofs. Learn how to check whether a number is divisible by 7 using the difference between twice the unit digit and the remaining part of the number. See solved examples, practice problems and frequently asked questions on divisibility rule of 7 . Learn about the divisibility rule of 7 , the divisibility rule of 11, and the divisibility rule of 13. These rules are explained with the example questions. Simple Explanation for Divisibility Rule of 7. If one wants to know what a number is divisible by, all one will have to do is divide the individual digits of the number by 7 . If any of the digits divide evenly by 7, then the original number is divisible by 7.