Question

how to find lcm and hcf

Answer 1

There are two methods by which we can find the LCM and HCF of Numbers.
       1.  Factorization Method
       2 . Division Method
 
 Here I am going to explain the factorization method
       
           Factorize each  number into prime factors .
           The Product of Least powers of Common FActors gives HCF.
           and Product of highest powers of all factors gives LCM .
 for Example ,
             Find HCF and LCM of 12 , 27 , 25
     Sol : 12 = 2² *3
             27 = 3³
             75 = 5² * 3
HCF = 3    (Note 3 is common factor and we choose least power of 3 )
LCM = 2² * 3³ * 5² = 4*27*25  =  2700

Hope this helps you !!
Thank You 

Answer 2

Answer:

First find the prime factorisation of all Numbers given.

For HCF ,

we find highest common factor by multiplying the number which are common in factorisation of each number

For LCM,

multiplying numbers which has highest power in list .

Ex.

4,6

4=2×2

6=3×2

HCF=2

LCM=2^2 ×3

=12

Hope it helps