Basics of Number Systems for UPPSC and CSAT Exams

Quantitative aptitude is a decisive factor in civil services exams, and the number system is the absolute foundation of this section. This text-based course guides you through core mathematical concepts, helping you build a solid foundation to solve exam-level problems with speed and accuracy. You will start by learning key terminology, basic definitions, and the classification of numbers before moving on to practical problem-solving techniques. What you'll learn: 1. Learn the classification of numbers, including integers, rational, irrational, and prime numbers; 2. Understand divisibility rules and their application in solving complex remainder problems; 3. Practice finding the unit digit, last digits, and the number of zeroes in a product; 4. Master concepts of LCM and HCF and apply them to exam-style word problems; 5. Apply simplification techniques, arithmetic progressions, and geometric progressions; 6. Solve CSAT-style questions using logical shortcuts and systematic steps. You will begin with fundamental definitions and number classifications before progressing to divisibility, remainders, and progression patterns. This course is designed specifically for beginners and civil services aspirants preparing for UPPSC, RO/ARO, and CSAT papers, with no advanced mathematical background required. Start reading today to secure your qualifying marks in the quantitative aptitude section.