42, 84 and 126
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If that's 1, 6 and 7, the answer is 42, 84 and 126. If that's 16 and 7, the answer is 112, 224 and 336.
Only one can be least. That's 42. The next two are 84 and 126.
Multiples of 7 (first 5) : 7, 14, 28, 35Multiples of 5 (first 7) : 5, 10, 15, 20, 25, 30, 35The least common is then 35.
The least common multiple of the numbers 2, 3, 6 and 7 is 42.
The least common multiple of 6, 7 and 11 is 462.