Hello. I'm looking for a simple drag and drop game. The main idea is to show some simple mathematic equation like 2+2 and what I want to do is to show 3 random answers (from 1 to 9) where one of them is correct. To answer the equation, I want the picturebox to be dropped into specified square and when the answer is right, we are getting +score. If the answer is wrong, we get some -score. In what way I can make a value of specified pictureBoxes (I have generated 9 graphics (numbers 1-9)) and generate them randomly but always with one correct answer?