Yes, you can focus on attempting specific sections with higher marking weightage to improve your overall score in the IIT JAM Mathematics Paper. Here's how:

1. Understand the Exam Pattern:
- Familiarize yourself with the exam pattern and marking scheme of the IIT JAM Mathematics Paper.
- Identify the sections with higher marking weightage based on the number of questions or the marks assigned to them.

2. Identify Your Strengths:
- Analyze your strengths and weaknesses in different topics of mathematics.
- Focus on the topics where you have a strong foundation and understanding.

3. Allocate Time Efficiently:
- Divide your time based on the weightage of each section.
- Allocate more time to sections with higher marking weightage to ensure you attempt all questions in those sections.

4. Prioritize High-Weightage Topics:
- Identify the topics within the sections with higher marking weightage that you are most comfortable with.
- Prioritize these topics during your preparation to ensure a strong grasp and command over them.

5. Practice Previous Year Papers:
- Solve previous year papers and mock tests to get an idea of the type of questions asked in the exam.
- Focus on practicing questions from the sections with higher marking weightage to gain familiarity and improve your speed and accuracy.

6. Seek Expert Guidance:
- If you find certain topics challenging, seek guidance from mentors, teachers, or online platforms like EduRev to clarify your doubts and strengthen your understanding.

7. Review and Revise:
- Regularly review and revise the topics you have studied, especially the ones with higher marking weightage.
- This will help you retain the concepts and formulas, and improve your problem-solving skills.

8. Time Management during the Exam:
- During the exam, allocate time wisely to ensure you attempt all questions from the sections with higher marking weightage first.
- If you are unsure about a particular question, move on to the next one and come back to it later if time permits.

By focusing on attempting specific sections with higher marking weightage, you can maximize your chances of scoring well in the IIT JAM Mathematics Paper. Remember to maintain a balanced approach and not neglect other sections entirely, as every question carries marks and contributes to your overall score.