Solution set of Ax = b as an affine subspace when consistent — IITM BS previous year questions

Solution set of Ax = b as an affine subspace when consistent is part of Affine Subspaces and Affine Mappings, Week 7 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.