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The common multiples of 20 and 56 are the multiples of their lowest common multiple, which is 280; there are infinitely many of them and they start:
280, 560, 840, 1120, 1400, 1680, 1960, 2240, 2520, 2800, 3080, 3360, 3640, 3920, 4200, 4480, 4760, 5040, 5320, 5600, 5880, 6160, 6440, 6720, 7000, 7280, 7560, 7840, 8120, 8400, 8680, 8960, 9240, 9520, 9800, 10080, 10360, 10640, 10920, 11200, 11480, 11760, 12040, 12320, 12600, 12880, 13160, 13440, 13720, 14000, 14280, 14560, 14840, 15120, 15400, 15680, 15960, 16240, 16520, 16800, 17080, 17360, 17640, 17920, 18200, 18480, 18760, 19040, 19320, 19600, 19880, 20160, 20440, 20720, 21000, 21280, 21560, 21840, 22120, 22400, 22680, 22960, 23240, 23520, 23800, 24080, 24360, 24640, 24920, 25200, 25480, 25760, 26040, 26320, 26600, 26880, 27160, 27440, 27720, 28000, ...
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What is the common multiples of 7 and 8?
56
What is the greatest common multiple of 20 28 and 56?
This cannot be answered because the common multiples of any two or more numbers are infinite.
List the first three common multiples of 2 and 7 and 8?
lcm(2, 7) = 14 → first 3 common multiples are: 14, 28, 42; lcm(2, 8) = 8 → first 3 common multiples are: 8, 16, 24; lcm(7, 8) = 56 → first 3 common multiples are: 56, 112, 168; lcm(2, 7, 8) = 56 → first 3 common multiples are: 56, 112, 168.
Why is 168 and 336 common multiples of 12 and 56?
Because the LCM of 12 and 56 is 168 and 336 is the next common multiple
What is 2 common multiples of 4 and 7 that are below 100?
28, 56
