Aspirants can effectively approach the numerical data questions in UPSC by first developing a strong foundation in basic mathematics and statistics. It is important to practice data interpretation, which often includes charts, graphs, and tables. Familiarizing oneself with common types of questions and working on time management during practice sessions can significantly improve efficiency. Additionally, using online resources and mock tests that replicate the exam format will enhance understanding of how to tackle such questions under pressure, thereby boosting confidence on the actual exam day.