CDS 2027 Elementary Number Theory Cheat Sheet - Free Study Material

Elementary Number Theory Cheat Sheet

Mastering Elementary Number Theory is essential for clearing the maths section as per the latest CDS 2027 syllabus and exam pattern. This concise cheat sheet serves as high-yield study material designed to cover important chapters, core concepts, formulas, and shortcuts required for quick revision during your preparation.

Key Topics Covered

• Divisibility Rules & Prime Numbers
• LCM and HCF Theorems & Applications
• Modular Arithmetic & Congruences
• Unit Digit & Remainder Theorems (Euler's & Fermat's)
• Number of Factors & Sum of Divisors