Multiples of 13 include 13, 26, 39 and so on. For them to be common, they need to be compared to another set of multiples.
Since both 11 and 13 are prime numbers, the LCM of these 2 number is 11 * 13 = 143. All multiples of 143 are multiples of 11 and 13 as well
There is an infinite number of common multiples for 12 and 13, and each is a multiple of the LCM of 12 and 13, which is 156, 312, 468, 624, 780, 936, and so on.
Multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52... Multiples of 13 are 13, 26, 39, 52, 65, 78, 91, 104... Common multiples of 4 and 13 are 52, 104, 156...
They are all multiples.
Those are known as "common multiples". The smallest POSITIVE of these common multiples is called the "least common multiple".
The least common multiples of 5, 11, and 13 is 715.
The common multiples of 6 and 13 are the infinite set of multiples of their LCM, which is 78. So the common multiples of 6 and 13 are 78, 156, 234, 312, 390, and so on.
78 and any of its multiples
The LCM of 9 and 13 is 117. Other common multiples include 234 and 351.
91
13 and 100 have no common multiples 1300
Since both 11 and 13 are prime numbers, the LCM of these 2 number is 11 * 13 = 143. All multiples of 143 are multiples of 11 and 13 as well
117
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There is an infinite number of common multiples for 12 and 13, and each is a multiple of the LCM of 12 and 13, which is 156, 312, 468, 624, 780, 936, and so on.
The first 10 multiples of 13 are: 13, 26, 39, 52, 65, 78, 91, 104, 117, and 130.
The least common multiple of the numbers 23 and 13 is 299.