Note that 9x3=27 so 27 is a multiple of 9. Now, 27 is also a multiple of itself since it is 27x1.
So the LCM or least common multiple is 27.
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Find the multiples of 27 and 15:Multiples of 27:..27 x 5 = 135Multiples of 15:..15 x 9 = 135Thus, 135 is the same common denominator for 27 and 15.
Multiples of 9 include 9, 18, 27 and so on. For them to be common, they need to be compared to another set of multiples.Itself and any other multiples of 9
Not all of them are. Consider 27. 6 and 9 share a lot of common multiples because they share a common factor.
The least common multiple of the numbers 4, 27 and 9 is 108.
Each common multiple of 9 and 10 occurs exactly once (in the list of common multiples), so there is no common multiple that occurs the most. All common multiples of 9 and 10 are the multiples of their least common multiple which is 90.