The concepts of LCM and HCF are to be introduced using the literal meaning of factors and multiples.....teachers confine the students to methods and therefore, the students are unable to apply the concept to solve practical problems of HCF and LCM.....watch this video useful for competitions as well.....for more such useful videos, keep visiting: https://www.youtube.com/channel/UCXJhrvWgd1v3jb8X1SZfcOg For more free videos, visit: http://sureshaggarwal.com For business enquiries, e-mail: drsureshaggarwal73@gmail.com For online classes and doubts, WhatsApp: +91 9896369963