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12

The rationale behind the context requirements is, ultimately, that we want well-written questions. I understand what you're getting at: if you post a simple one line PSQ and a follow it up with an answer, then one might be inclined to think the answer could serve in some sense as context, especially if it is nice and detailed. But structuring things in that ...

7

Just a partial answer. In my opinion, some questions that is well-received in puzzling SE will be considered missing context when posted in MSE. Using your example: The non-negative integers are divided into three groups as follows: \begin{align*} A &= \{0,3,6,8,9, \cdots\},\\ B &= \{1,4,7,11,14,\cdots\}, \\ C &=\{2,5,10,13,\cdots\} \end{align*} ...

6

You can ask that on the main site. But I suggest First you search the site for similar questions. The topics that you are interested in are very standard and you can find a lot of these questions under the tag "book-recommendation" (This is what I found under the tags [book-recommendation] and [linear-algebra], ordered by votes). If you have some ...

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