One can also find periodical sequences for other natural numbers. E.g.,
* for 11, the sequence +1, -1, ...
* for 13, the sequence 1, -3, -4, -1, 3, 4, ...
For most divisors, it is not practical to test divisibility this way, as there are only few easily remembered weight sequences.
One can also find periodical sequences for other natural numbers. E.g.,
* for 11, the sequence +1, -1, ...
* for 13, the sequence 1, -3, -4, -1, 3, 4, ...
For most divisors, it is not practical to test divisibility this way, as there are only few easily remembered weight sequences.