2

Google Ngram gives this plot

enter image description here

It seems that "this kind of question" is more common. I guess I could deduce that "this kind of question" is more idiomatic than "this kind of questions".

The question is whether both are grammatical?

1 Answer 1

3

Both are grammatical, but the expression with plural "questions" seems unnecessary, since a "kind of question" can refer to any number of questions.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .