Accessing the answer key for the IIT JAM Mathematics Exam without your exam center mentioned on it is not possible. The answer key is a confidential document that is typically distributed only to the exam centers for evaluation purposes. It contains the correct answers to all the questions asked in the exam. However, there are certain ways you can still prepare for the exam effectively.

Preparing for the IIT JAM Mathematics Exam:

1. Study the Syllabus:
- Familiarize yourself with the syllabus for the IIT JAM Mathematics Exam.
- Understand the topics and subtopics that are covered in the exam.

2. Reference Books:
- Make use of recommended reference books to study the concepts thoroughly.
- Practice solving problems from these books to improve your problem-solving skills.

3. Previous Year Question Papers:
- Obtain previous year question papers of the IIT JAM Mathematics Exam.
- Solve these papers to get an idea of the exam pattern and the types of questions asked.
- Analyze your performance and identify areas where you need improvement.

4. Mock Tests:
- Take advantage of online platforms that offer mock tests specifically designed for the IIT JAM Mathematics Exam.
- These mock tests simulate the actual exam environment and help you assess your preparation level.

5. Study Groups and Coaching Classes:
- Join study groups or enroll in coaching classes to receive guidance from experienced mentors and interact with fellow aspirants.
- Discussing concepts and problem-solving strategies with others can enhance your understanding and knowledge.

6. Online Resources:
- Utilize online resources such as video lectures, tutorials, and educational websites to supplement your preparation.
- EduRev, for example, is a comprehensive online platform that offers study materials, practice questions, and other resources for the IIT JAM Mathematics Exam.

7. Self-Evaluation:
- Regularly assess your progress by solving practice questions and evaluating your performance.
- Identify your strengths and weaknesses and allocate more time to topics that require additional attention.

By following these steps and putting in consistent effort, you can enhance your preparation for the IIT JAM Mathematics Exam and increase your chances of success.