If you forget your Apple ID password, then you can reset your passcode from any trusted iPhone/iPad/iPod touch or Mac. If you cannot change or reset the password, then you can answer the Security questions to activate your iPad. But, in case, you even forget the answers to your security questions, then you need to verify your identity to reset your security questions. You can do that visiting iforgot.apple.com, enter your Apple ID here, and select the option “I need to reset my security questions”. Follow the on-screen instructions to get the job done.