A lot of math is based on word problems and has ambiguities from language. E.g. "Alice gives Bob half her apples and Bob gives Alice half his apples". The numbe

A lot of math is based on word problems and has ambiguities from language. E.g. "Alice gives Bob half her apples and Bob gives Alice half his apples". The number of apples each of them has depends on whether the actions were simultaneous or sequential and whether "his apples" refers to the apples Bob just received from Alice. That's a great example and teaches about race conditions too! But there's still a finite set of correct answers, and without showing working there's no way to teach them. And for all I know, this question might not work in languages other than English and isn't that one of the points of this whole exercise...