I'm completely stuck on this logic problem, which was on a school test given by my 8th grade math teacher, who I assume wrote the problem. Can anyone help me understand it? I have tried to figure out the sticks and circles logic, but to no avail. I'd be grateful if anyone could show me how this is done, and if there is a resource to learn about this style of problem.
P.S.-The test was graded and returned (so I'm not cheating). I just didn't get the right answer, and I'm curious to figure out what it might be.