Your best place to find 2019 past papers of general math 10th class from bise rawalpindi board. These old up to date papers can be downloaded or viewed online.
2019 General math Past Papers 9th Class BISE Rawalpindi Board Analysis
Campus.pk gives you unique insight into each past paper about what are the top chapters and topics.
General-math Past Papers 9th Class BISE Rawalpindi Board