I was explaining why they want you to show your work. I work with a lot of engineers who got the right answers on tests in university, but you give them a unique problem they can't reason out a new method to solve it. This is why testing wants you to show your work so somebody can check you are connecting the dots of reasoning. All they would have to do tgough is make the question multipart, so step A asks for a certain portion, step b asks for next portion, and so on. Passing University doesn't always mean you can think. Granted other testing is needed to assist non typical learners