Generally, the sample questions of self-enrollment will not contain all the questions, but just let you know what the questions are like. Last year, Kazuki Watanabe musician's self-recruited sample questions were not only few in number, but also few in number. There will be many more real exam questions, and mathematics is the most painful. Other subjects are good enough, as long as you are at a higher level, you can finish them, but it seems that no one can finish math. I didn't even know what the question was when I took the English exam (I didn't know any words), but I got a high score in the end, so don't worry too much.