I made an edit to a question where in addition to correction "maths" to "math", I also added math formatting. It was apparently rejected--the reviewer made the same math formatting edits that I made, but rejected the correction from "maths" to "math". Is "maths" actually correct in some instances?
Just so this doesn't fall under "unanswered."
As can be seen in this English.SE question (linked by Ｊ. M. in the comments), "maths" is the British English form of the American English "math." As this is an international site, either is acceptable.