Q: What are the first 3 common multiples of 10 and 20?

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They are 10 and 20

10, 20, 30 The common multiples of 5 and 10 are multiples of their lowest common multiple. The lcm of 5 and 10, is 10. Thus the first three common multiples are 10, 20, 30.

10, 20, 30.

20 is the smallest common multiple of 4, 5, and 10, and thus the first. Thus, the first three common multiples of 4, 5, and 10 are 20, 40 and 60.

The LCM is 20

10, 20, 30

10, 20, 30

20, 40, 60

20, 40 and 60

20, 40, 60

10, 20, 30.

20 30 40