This answer is based on the examination standard and scoring method of the written mathematics test in New Oriental junior high school. Generally speaking, candidates with a score above 60 can be considered as passing, while candidates with a score below 60 need to further improve their math knowledge and problem-solving ability.

In order to pass the written mathematics test in New Oriental junior high school, candidates need to have a solid mathematical foundation and certain problem-solving skills. They need to master all the knowledge points of junior high school mathematics, such as algebra, geometry, probability and so on. And can apply these knowledge points to practical problems. In addition, candidates also need to have good ideas and methods to solve problems, and can quickly and accurately analyze problems and give solutions.

For candidates who want to improve their math scores, the following methods can be adopted:

1. Do more exercise. By doing a lot of math exercises, we can deepen our understanding and memory of math knowledge and improve our ability and speed of solving problems.

2. Pay attention to the study of basic knowledge. All the knowledge points of junior high school mathematics are interrelated. If you want to master them comprehensively, you need to pay attention to the study and understanding of basic knowledge.

3. Participate in math remedial classes or extracurricular training. Participating in special math tutorial classes or extracurricular training can help candidates learn math knowledge systematically and improve their problem-solving ability and skills.

To sum up, if you want to pass the written math test in New Oriental junior high school, candidates need to have a solid math foundation and certain problem-solving skills. By doing more exercises, paying attention to the study of basic knowledge, and taking part in math remedial classes, you can effectively improve your math level and grades.