Answer:
the lcm is 30
Explanation:
30
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, ..., 30
Multiples of 6: 6, 12, 18, 24, 30
Multiples of 10: 10, 20, 30
30 is the first number to appear on all three lists of multiples
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