Playing with numbers
LCM
Common Multiples
Methods of finding LCM
Prime Factorization Method
Division Method
HCF
Common Factors
Methods of finding HCF
Prime Factorization Method
Division Method
Relationship between LCM and HCF
Divisibility Rules
Divisibility by: 2,3,5,6,9,10,11
Factorization
Prime and Composite Numbers
Coprimes and Twin Primes
Prime Factorization
Division Method
Common Tree Method