This method is to find LCM of given numbers.


Let’s say we want to find LCM of 20 and 60.


First write 4 and 20 as shown below


LCM


Divide 20 and 60 by 2


Quick Method For Finding LCM


Divide 10 and 30 by 2


Finding LCM


We can not divide any of 5 and 15 by 2 perfectly. So divide them by three.


Here 5 is not divisible by 3 so 5 is written as it is.


Shortcut Method For Finding LCM


Divide 5 and 5 by 5.


Shortcut Method For Finding LCM


Stop this process when last row has all 1s.


So the LCM is 2 × 2 × 3 × 5 = 60