My Ipad wont download apps that ive offloaded then deleted

Restarting your iPad may be helpful:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

Your router may also be unexpectedly blocking access to some internet resources; a restart of your WiFi Router may also resolve the problem.

To restart you home router, disconnect power - then wait at least 30 seconds before restarting. When you router has rebooted (which may take several minutes), force-restart your iPad as described above.