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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.

Q: List the first three common multiples of 2 and 7 and 8?

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The first three multiples of 3 and 5 are 15, 30 and 45.

list the first 10 multiples of 15

Each common multiple of 9 and 10 occurs exactly once (in the list of common multiples), so there is no common multiple that occurs the most. All common multiples of 9 and 10 are the multiples of their least common multiple which is 90.

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