Hi, I vote for sentence 1, although 4 might be correct. 2 and 3 are definitely not correct. I have a little problem with the choice of the word maths .
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TrysBI have a little problem with the choice of the word maths.In some cultures, the word maths is commonly used to mention mathematics. In some educational systems, maths is referred to as a subject of learning, at least in my country where it is used and printed on books as an accepted word.