"Vím o prasatech hodně zajímavých věcí."

Translation: I know many interesting things about pigs.

[Pollyhs]

vim zajímavé věci o prasatech is that also correct?

[VladaFu]

That is a correct Czech sentence, but it is missing the very.

[Pollyhs]

and what about ... hodne zajimavi for ... many interesting ...

[VladaFu]

hodně zajímavé věci = very interesting things

[Pollyhs]

okay. If that is also correct why is the sentence in duolingo different. Does it have to do with cultural issues?? or grammar?

[VladaFu]

No, it is not correct here. Hodně zajímavé věci means very interesting things. Hodně zajímavých věci is a lot of interesting things, many interesting things, the genitive is used with hodně, málo, trochu, number above four and so on.