The least or lowest common multiple (LCM) of 16 25 and 27 is 10,800. The other common multiples of 16, 25, and 27 are multiples of 10,800, so they are 10,800; 21,600, etc.
There is an infinite number of common multiples for 16 25 and 27. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
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Common multiples include any multiple of 405.
The common multiples of 18 and 27 are 54, 108, 162, 216, and so on. Each is a multiple of 54, which is the least common multiple of 18 and 27. There is an infinite number of common multiples for 18 and 27. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
The first 5 multiples of 9 are 9, 18, 27, 36, and 45. For them to be common, they need to be compared to another set of multiples.
To find a number that is not a common multiple of 4 and 9, we need to consider the multiples of each number. The multiples of 4 are 4, 8, 12, 16, 20, 24, ... and the multiples of 9 are 9, 18, 27, 36, 45, ... The first number in the list of multiples of 4 that is not a multiple of 9 is 4. Therefore, 4 is a number that is not a common multiple of 4 and 9.
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