Multiply a number by succesive counting numbers.
10 x 1 = 10
10 x 2 = 20
10 x 3 = 30
10, 20 and 30 are multiples of 10.
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common multiples
Multiples. Numbers have an infinite number of multiples.
Factors go into the number. The number goes into 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.
360 has an infinite number of multiples.