Can anyone please help me with this proof(adsbygoogle = window.adsbygoogle || []).push({});

Prove that every positive integer, ending in 5 creates a number that when squared ends in 25

**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!

# Don't know where to start when doing these proofs

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