Find the LCM and HCF of 6 and 20 by the prime factorisation method. Find the LCM and HCF of 6 and 20 by the prime factorisation method. October 3, 2020 Category: Chapter 1 - Real Numbers , Exercise 7.1 , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related