Number Systems
Objectives
- Understand types of numbers, divisibility, HCF/LCM.
- Apply to SSC CGL/CHSL/CPO problems.
Key Concepts
- Natural, whole, integers, rationals, irrationals.
- Divisibility rules, remainders, cyclicity.
- HCF/LCM using prime factorization.
Key Formulas
- LCM × HCF = Product (for two numbers).
Solved Example
Find HCF and LCM of 24 and 36.
PYQs
Practice PYQs with remainder cycles and factors.
BETA
