Usually math is ok, what level?
If the math score is less than 85% every time, it is difficult to take the joint exam; But if it can be achieved, plus hard work, the preliminary round is no problem, and the rematch depends on the situation.
However, give some advice to the landlord.
There are two or three parts in the scope of the entrance examination:
The first part is algebra, and the important thing is the idea of function. We should remember several key formulas and inequalities.
The second part is geometry, including analytic geometry.
The third part is number theory.
In view of too much content and great difficulty, I suggest you buy a complete book on solving problems in league or Olympic Games.
The knowledge points inside are still relatively detailed. There will be previous competition questions at the back of the book.
Finally, it is strongly recommended that all the theorems and formulas in the outline be written down and used flexibly. The following is a link to the syllabus.
Don't overdo it, after all, some people spend two years preparing for the league.