Number System – SSC CGL Maths

SSC CGL Maths (Mathematical Abilities) ke Number System chapter ke concepts, rules, tricks aur practice questions.

Topics

• 01 01. Basics & Classification of Numbers Basics
• 02 02. Sets & Properties (N, W, Z, Q, Irrational) Basics
• 03 03. Place Value & Face Value Basics
• 04 04. Comparison & Ordering of Numbers Basics
• 05 05. Factors, Multiples & Basic Identities Core
• 06 06. Prime, Composite & Co-prime Numbers Core
• 07 07. Divisibility Rules (2–12, 15, 16, 18, etc.) Core
• 08 08. HCF & LCM (Methods + Properties) Core
• 09 09. Euclid Algorithm (HCF Fast Method) Core
• 10 10. Fractions & Decimals (Terminating/Recurring) Core
• 11 11. Remainders & Modulo Arithmetic Advanced
• 12 12. Unit Digit & Cyclicity (Powers) Advanced
• 13 13. Last Two Digits / Last Digit Patterns Advanced
• 14 14. Highest Power of a Prime in n! (Legendre) Advanced
• 15 15. Trailing Zeros in Factorial / Product Advanced
• 16 16. Base System (Binary/Decimal) Basics Advanced
• 17 17. Number of Divisors & Sum of Divisors Applications
• 18 18. HCF–LCM Word Problems (Trains, Bells, etc.) Applications
• 19 19. Number Formation & Digits Based Problems Applications
• 20 20. Number System Based Series & Patterns Applications
• 21 21. Previous Year Questions (Number System) Practice
• 22 22. Practice Questions (Mixed + Timed) Practice