Preparing for the IISER Aptitude Test (IAT) becomes much easier when you practice with previous years’ question papers. On this page, you can view IISER Aptitude Test previous year papers for free. These papers help you understand the latest exam pattern, difficulty level, question types, and the weightage of different topics in Physics, Chemistry, Mathematics, and Biology. Solving them under timed conditions is one of the most effective ways to improve speed, accuracy, and confidence before the exam. Whether you are beginning your preparation or revising in the final weeks, these IAT previous year question papers are an essential resource to assess your performance and identify areas that need improvement.