Hi. Draw an incorrect pattern 5 times > tap 'Forgot pattern" you may have to wait 30 seconds > login using your Gmail credentials (you need to have both data/airtime and active internet connection for that method to work). Otherwise, try hard resetting the tablet as per the steps here
http://satechhelp.co.za/4971/Common-Hard-Reset-Steps-Android-Powered-Devices If that fails, then kindly comment below with the model number that is written at the back of the table starting with FMT-NM...