There are many series of Olympic Mathematics tutorials published, and the difficulty is not the same.

1, Olympiad Mathematics Course Series

Authors: Denton, Xiong Bin.

Price per copy 10 yuan.

2. Orsay Classic Series

Authors: Shen Wenxuan, Wu, et al.

Junior high school is divided into four volumes: geometry, algebra, combination and number theory. The price of each book is a little higher than that of 20 yuan.

3. "From Classroom to Olympiad Mathematics —— Lecture on Junior Middle School Mathematics Training Competition"

Author: qi,

There are three volumes in the seventh, eighth and ninth grades of junior high school, and each volume is divided into two parts: excellent training and competition. Every book is about 20 yuan.

4. Junior High School Mathematics Competition Training Course: Basic Knowledge

Authors: Li, Ma Maonian

Pricing: Near 20 yuan.

The above four series are all textbooks written by former national team leaders and coaches. The comparison of the series of "Junior Middle School Mathematics Competition Training Course: Basic Knowledge" and "Olympic Mathematics Course". Teacher Zhu Huawei hasn't read the textbook, so the difficulty is not clear.