Guwahati, May 27 -- The Indian Institutes of Science Education and Research (IISER) successfully conducted the IISER Aptitude Test (IAT) 2025 on May 25, 2025, for admissions into undergraduate science programs.

Just a day later, on May 26, 2025, the provisional answer key was made available on the official IISER admission portal.

How to Download the IISER IAT 2025 Answer Key

To access the answer key:

Visit iiseradmission.inClick on the "IAT 2025 Answer Key" link on the homepage.Choose the language (English or Hindi) and download the PDF.

Estimating Your Score with the Answer Key

To calculate your approximate marks:Correct Answer: +3 marksIncorrect Answer: -1 mark

Example:45 correct answers = 45 x 3 = 13510 incorrect answers = 10 x ...