I use a password protect so that no one else can access my Ipad but a person figured it out and I cannot remember what I re-set it to.
If you cannot remember the password, then you'll have to connect to itunes on computer and restore the device.
If You Are Locked Out Or Have Forgotten Your Passcode
iTunes 10 for Mac- Update and restore software on iPod, iPhone, or iPad
iPhone, iPad, iPod touch: Wrong passcode results in red disabled screen
iOS- Understanding Passcodes
Retrieving data ...