I passed the 47th exam. The lectures are great to listen to while commuting on the subway. However, you probably can't pass by just watching these lectures alone; you'll likely need to purchase the textbook for in-depth study. The quizzes in the middle of the lectures are AI-generated and contained some strange questions, so I used Gemini to generate and solve about 500 mock questions instead. I studied for about three and a half weeks, and during the three days before the exam, I purchased the instructor's 300 mock questions and went through them twice, which I think helped quite a bit.