To raise a question is to bring a matter up so that other people have to deal with it. A hand goes up at the back of the room.
It takes about: those figures raise a question about the whole plan. Raise is the lifting verb, so the picture is of putting something where everyone can see it rather than of asking — which is why a report can raise one without anybody speaking. Beg the question means something quite different and stricter: to assume the very thing you are meant to be proving.
1phraseraise a questionTo bring a matter up for consideration.
“Those figures raise a question about the whole plan.”
raise a question is an act of bringing something up.
Practised in Common Word Pairs