Sudoku and ken ken puzzles won't display on my iPad screen when I try to access newspaper puzzles using Safari. The space for the puzzle is just blank. How do I fix?

It's possible that those puzzles are based on Flash, which won't work on the iPad's Safari.

You can look for other browsers, like iSwiffer or Photon that support flash and see if that helps. the easier and possibly cheaper way would be to look if that site has an app, which would allow access to the puzzles without needing flash (if that is indeed the issue)

Yes, KENKEN is flash. There is a very good App I use on my iPad. There are many sudoku sites and some should work for you.