"In what way does he do it?"

Translation: W jaki sposób on to robi?

[DmitryReve]

Can't I say it in the instrumental case: Jakim sposobem on to robi? Google shows that this is also used.

[Jellei]

I think it's fine, added.

[JaimeGarci426248]

Why not w + locative in this case? E.g. w jakim sposobie? What is the grammar rule here?

In this same lesson, there is 'w tym przypadku' which uses the locative case.

[Andrej732683]

I thought the same..

[Jellei]

Maybe there is some explanation, but frankly, I guess it's best to just remember those as fixed phrases.

[macmroz]

"Jak on to robi" - powinno być uznane. Should be accepted. Znaczenie dokładnie to samo, tylko krócej.

[Jellei]

Cóż, akceptujemy "how" po angielsku, więc pewnie faktycznie powinniśmy akceptować "jak" po polsku. Dodałem.