how to find lcm by prime factorization method

to find the LCM by prime factorization method: first we will write the prime factors of the given numbers.

then multiply each factor the greatest number of times it occurs in either number. if the same factor occurs more than once in both numbers, you multiply the factor the greatest number of times it occurs.

for example: let us find the LCM of 3, 9 and 21.

hope this helps you.

cheers!!.

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just keep dividing the number as in HCF and when we see that the numbers aren't divisible so we will multiply the the lcm. then we will write the common numbers and multiply them.

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