Modular Power Train

Let \(0<n \leq 50\) be a positive integer satisfying the relation

\(\Large{\left(\sum_{i=1}^{n} (-1)^{i}\left(i^{i^2} \mod 10\right)\right) \mod 10 = n \mod 10}\)

Find the sum of all the solutions in the range \(0<n \leq 50\).

×

Problem Loading...

Note Loading...

Set Loading...