How to change or reset your iPad's passcode, even if you don't remember what the passcode is

To reset or change your iPad's passcode, you can use the "Passcode" menu in your Settings app, or reset the entire device.

How to reset an iPad to its factory settings if a simple restart doesn't solve your technical issues

You can reset an iPad to its factory settings if you're experiencing significant problems with it or are planning to sell it ...