Again you expect the interviewee to read your mind that he should ask a particular question. The puzzle is set up with certain conditions and boundary to see h

Again you expect the interviewee to read your mind that he should ask a particular question. The puzzle is set up with certain conditions and boundary to see how the interviewee performs with those constraints. If one of the terms of the puzzle can be changed, then other terms can be changed, too. I would just replace the egg with a steel ball and be done with it, like just in real life you can just push the boundary and replace the meaning of the question completely.