"Who can answer this question?"

Translation: 谁能回答这个问题？

[Gabrielle145359]

Should it be "这题问题“？

[DariusLee3]

Nope, for 問題 the classifier is 個 or 條 (I think)。The other way to write the sentence can be 这题有谁能回答？, where 这题 means "This question"

[KX3.]

I'm not sure about 条 as can't remember all the specific measure words （量词） now, but 个 and 道 are both correct.

[pat5120]

Can we use 会，可以 instead of 能 here? And can it be 可能？

[JChien6953]

谁可以回答这个问题 should also be accepted.