Best Answer

First break the numbers down into their prime factors:

9 = 32

15 = 3 x 5

5 = 5

The LCM is the product of all the primes in each list. However if the number occurs in list twice it is only counted once.

So LCM of 9, 15 and 5 = 3 x 3 x 5 = 45

An example: studymaths.co.uk/keytopics/hcfandlcm.html

lcm(5, 9, 15) = 45.

5 = 5

9 = 3^2

15 = 3 x 5

lcm = 3^2 x 5 = 45

45

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Q: What is the LCM of 9 15 and 5?

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