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Bob must choose a number between 61 and 107 that is a multiple of 3, 5, and 6. If there are more than one number, separate them with commas.

User Ghokun
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multiples of 3 between 61 and 107 are
63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99, 102, 105

multiples of 5 between 61 and 107 are
67, 70, 75, 80, 85, 90, 95, 100, 105

multiples of 6 between 61 and 107 are
66, 72, 78, 84, 90, 96, 102

With the 3 and the 5 they share the numbers,
75, 90, 105

The 3 and 6 share the numbers
66, 72, 78, 84, 90, 96, 102

The 5 and 6 share the number
90

The only one I see that's common with all three of them is
90
User Magnas
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