## Cubes And Multiples Of 7

#### Problem

Prove that for any number that is not a multiple of seven, then its cube will be one more or one less than a multiple of 7.

Problem ID: 24 (Nov 2000) Difficulty: 3 Star

Prove that for any number that is not a multiple of seven, then its cube will be one more or one less than a multiple of 7.

Problem ID: 24 (Nov 2000) Difficulty: 3 Star