Could someone please tell me what condition on n is necessary and sufficient such that Z/nZ contains a nilpotent element?(adsbygoogle = window.adsbygoogle || []).push({});

I can't seem to find this in any of my texts.

By the way, I accidently posted this same question in the homework help section first. Sorry to anyone who's wondering why I'm cluttering up multiple boards with my quandries.

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# Necessary and sufficient condition

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