My best advice is to not focus so much on correct answers but more on the concept of how you get to the correct answer, there's no difference between a "hard" problem and an "easy" problem. They all follow the same concept, mastery is just having a stronger ability to interpret the structures faster. Just focus more on how you analyze the problem and it won't take long. For example, key hole is just TFE but you already know what the shape looks like. TFE is just reading lines and knowing what a solid and dash line is. Angles is just quick reference between two similar shapes, hole punch is just grid method, cubes is simple counting and rotating an image in your head and pattern folding is just trial and error and noticing where lines aren't correctly oriented. PAT is definitely not as hard as people make it out to be, most people just don't try to learn the theory behind it.
