BelalM

The only thing I can think of is to go over the answers on the PDF immediately after completing the test and try to remember what the questions were. Usually I was able to remember the sticking point or what I did wrong. Sometimes I looked back at my scratch paper for some of the key variables.
Otherwise agree that the explanations are often poor and incomplete. If you don’t have the questions fresh in your memory, then later on the explanations can be of little value…