Directional derivative as rate of change in a chosen direction — IITM BS previous year questions

Directional derivative as rate of change in a chosen direction is part of Directional Derivatives, Week 9 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.