Wiping an iPad with no "Reset" button on the iPad itself
Hook your iPad up to your computer or laptop with iTunes and you will see a reset to factory defaults as one of the options. I had the same problem and found the solution online, I'm not sure why the reset button is not on the iPad...
Hook it up to your computer and open iTunes and one of the options is to restore your iPad. I had the same problem, it wasn't on the iPad it was on the web under iTunes options where you backup and restore your devices!