11, 22, 33, 44, 55, 66, 77
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The common multiples of any two (or more) numbers are multiples of their lowest common multiple (lcm). lcm(9, 11) = 99 → first five common multiples are: 99, 198, 297, 396, 495
They are: 11 22 33 44 and 55
The first 3 multiples of 7 are: 7, 14, and 21.The first 3 multiples of 14 are: 14, 28, and 42.
Since the lowest common multiple of 6 and 7 is 42, the multiples of 6 and 7 are multiples of 42. The first five are: 42 84 126 168 210
the first three common multiples of 7, 20, and 35 are 140, 280, and 420