HCF and LCM of 12 15 and 21 || prime factorisation method

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HCF and LCM of 12 15 and 21 || prime factorisation method

Hello students in this educational video
tutorial you will learn how to find out
HCF and LCM of any given numbers using
prime factor method.

this is question from exercise 1.2 of chapter
Real Numers of class 10 NCERT maths.

Question is that:
Find the LCM and HCF of the following integers
by applying the prime factorisation method.
(1) 12, 15 and 21

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