July 15, 2015 Problem of the week #172 July 15th, 2015 Leave a comment Here is this week’s POTW: —– Is there an integer $k$ such that $\sqrt{k-1}+\sqrt{k+1}$ is a rational number? —– Remember to read… Advertisements Share this:TwitterFacebookGoogleLike this:Like Loading... Related Posted by ronaldconnelly423.