Hello,
Let me clear you firstly that, the institute does not release the previous year papers. And also, you have to mark the answer on the question paper itself, and they are collected by them. So, finding the previous year paper, is just impossible.
But you can prepare for this exam, by knowing its exam pattern. There are 2 sections in this exam. 70 MCQ's are asked in the first section and they cover topics like logical reasoning, english, maths, general knowledge etc.
The second section consists of 30 MCQ's, and it covers topics like critical analysis and thinking. Below, I have pasted a link. Here you can get to know about the important things about this exam, and also about exam preparation.
https://www.google.com/amp/s/bschool.careers360.com/articles/st-xaviers-bms-exam-pattern/amp
Hope it helps.
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