Cramer's rule setup for Ax = b with det(A) != 0 — IITM BS previous year questions

Cramer's rule setup for Ax = b with det(A) != 0 is part of Cramer's Rule, Week 2 in Mathematics 2. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.