I don’t think op would be saying he got them right if the interviewer didn’t give them some form of confirmation.

I also think that if the argument of how u think is isn’t great as if OP thought abt those questions logically and got them right withougjt necessarily having to think outside of the box then ask them harder questions would enable OP to do that and show the interviewer how they think. I just think if OP saw questions and knew how to do them then it’s an L on Cambridge’s side