Solution:

Introduction:
IIT JAM (Joint Admission Test for M.Sc.) is a national-level entrance exam conducted by various Indian Institutes of Technology (IITs) for admission to the postgraduate programs in science and technology. The Mathematics paper of IIT JAM is highly competitive and requires thorough preparation. Access to the answer key can be highly beneficial for candidates to evaluate their performance and identify areas of improvement.

Mobile Applications:
There are several mobile applications available that provide access to the answer key for the IIT JAM Mathematics paper. These applications can be downloaded from the Google Play Store or Apple App Store. Some popular mobile applications include:

1. EduRev: EduRev is a widely used mobile application that offers a comprehensive collection of study materials, previous year question papers, and answer keys for various competitive exams, including IIT JAM Mathematics.

Online Platforms:
Apart from mobile applications, there are also several online platforms that provide access to the answer key for the IIT JAM Mathematics paper. These platforms can be accessed through web browsers on mobile devices or computers. One such reliable online platform is:

1. EduRev Website: EduRev's website offers a dedicated section for IIT JAM Mathematics, where you can find the answer key for previous year papers. The answer keys are provided in PDF format, which can be easily downloaded and accessed on mobile devices.

Advantages of Accessing Answer Keys:
Accessing the answer key for the IIT JAM Mathematics paper through mobile applications or online platforms can provide the following advantages:

1. Self-Evaluation: Candidates can compare their answers with the answer key to evaluate their performance in the exam. This helps in identifying strengths and weaknesses, allowing for targeted preparation for future exams.

2. Time Management: By analyzing the answer key, candidates can determine the time spent on each question. This helps in improving time management skills and optimizing the attempt strategy for maximum efficiency.

3. Conceptual Clarity: Answer keys often contain detailed solutions, which can help candidates understand the concepts and techniques used to solve the questions. This aids in strengthening their understanding of the subject.

4. Exam Pattern Familiarity: Regularly referring to the answer key can familiarize candidates with the exam pattern and types of questions asked in the IIT JAM Mathematics paper. This enables them to develop better strategies and techniques for tackling similar questions in the future.

In conclusion, accessing the answer key for the IIT JAM Mathematics paper through mobile applications or online platforms such as EduRev can be highly beneficial for candidates. It provides a means for self-evaluation, time management improvement, conceptual clarity, and familiarity with the exam pattern.