The aptitude test of the UPSC exams primarily assesses logical reasoning, numerical ability, and general mental ability. It evaluates candidates' capacity to solve problems using analytical and critical thinking skills, allowing the assessment of their decision-making capabilities. The tests encompass various question types, including data interpretation and quantitative analysis, ensuring a comprehensive evaluation of cognitive skills. Proficiency in these areas is crucial as they indicate a candidate’s potential to handle complex tasks in the Civil Services.