They do not put out the previous years papers in public domain but the do release some sample questions on their website, you could check them out.

Visit our site for sample papers-https://bschool.careers360.com/download/ipmat-sample-papers-previous-years

IPMAT previous won't be available anywhere as the institute doesn't releases it. Though it does releases a practise paper which comprises of questions from different years of IPMAT. 

cheers!