Can I factory reset my tablet remotely? QUESTION:  

I just won DUFUS prize of the century!  First I sold my Galaxy Tab 3 Lite on Ebay.  Second - I mailed it out to buyer - Great!  Third - I awoke the next morning to remember (only AFTER I mailed it) that I'd forgotten to erase it first!  The problem is NOT sensitive information.  The problem is (still using my Google Password) the buyer might not be able to get into, and use the tablet.
You can use Android Device Manager to remotely wipe (or other tasks) with your android.

Just login with your google account (should be same as the account on your device). And then select the Erase option.