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...
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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
Common multiples of 7 and 4 include any multiple of 28.
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 common multiples of 4 and 5 are 20, 40, 60, 80,100 and so onGet the least common multiple of the two. All other common multiples are multiples of this least common multiple.Any multiple of 20.