MathOverflow off-topic close reason breakdown

* MathOverflow is for mathematicians to ask questions to each other about their research. Questions about homework are generally [off-topic](http://mathoverflow.net/help/on-topic). - 1
* Other (add a comment explaining what is wrong) - 83
* Questions about homework are generally [off-topic](http://mathoverflow.net/help/on-topic). MathOverflow is for mathematicians to ask each other questions about their research. - 75
* This question belongs on another site in the Stack Exchange network - 578
* This question does not appear to be about $Topic within the scope defined in the [help/on-topic]. - 796
* This question does not appear to be about research level mathematics within the scope defined in the [help/on-topic]. - 320