Student or Learner
Good day, everyone.
The use of "whose" is a bit informal to me, just like:
There are problems whose solutions have baffled many philosophers in every age.
Therefore, I have tried to change it to "which of" as follows:
There are problems solutions of which have baffled many philosophers in every age.
And, then I am a bit doubtful about it because of the immediate adjacent position of the "solutions" to the "problems".
I also cannot put a comma between them because the relative clause is defining.
So, how should I restructure the sentence?
There are problems the solutions to/for which have baffled philosophers in every age.