If you are a student of the general or OBC category, you will have an age limit of 20 years of age to register for the IPM Aptitude Test. For candidates of the SC and ST category, you have an age limit of 22 years.
Other than this, make sure that you meet the eligibility criteria. You need to have 60% aggregate marks in your high school (10th grade) and higher secondary (12th grade) for general and OBC categories.
If you are from the SC/ST or PDW category, the above criteria is lowered to 55% aggregate marks.