Parametric solution for systems with free variables — IITM BS previous year questions

Parametric solution for systems with free variables is part of Row Reduction and Gaussian Elimination, 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.