Go back to previous page
Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: High school
Topic ID: 408
Message ID: 3
#3, RE: Number theory question
Posted by mr_homm on Mar-29-11 at 07:20 AM
In response to message #2
A hint:

Try reducing the expressions mod 3 and mod 8. Then, what are all the squares in mod 3 and mod 8? From there, you can work out the details.