How do I find out if a number is a perfect square modulo a? For example, is 4 (mod 10) a perfect square?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Perfect squares

**Physics Forums | Science Articles, Homework Help, Discussion**