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December 20, 2014

December 20, 2014

Posted by **Anna** on Wednesday, April 6, 2011 at 9:14pm.

12. For every prime p and nonzero n we have n^2 is congruent to nMODp if and only if either n is congruent to 1MODp or n is congruent to 0MODp.

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