Verified Answer :

baabaagreysheep

12, 21, and 28 all go into the first two multiples of 6 and 14 together (so 6 × 14 = 84, and 84 + 84 = 168). I would include 8 because it goes into 168, but it does not go into 84 so it is incorrect.

I believe 8 but don't quote me cause I truly suck at math. If you ask me about Algebra though there I might be able to help you.

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