In this session, the instructor walked learners through an important foundational concept, emphasizing the need for clarity before applying formulas or shortcuts.

The discussion began with a breakdown of the core idea, helping learners understand how different elements interact and why each step in the process matters. A worked example was then used to demonstrate the correct approach to solving questions, with special attention given to identifying what is provided and what needs to be solved.

Common mistakes were highlighted along the way, particularly the tendency to rush through the setup without fully understanding the problem. The instructor showed how even small changes in values can significantly affect the final outcome,