First,
page 4, is it "unsolvable by anyone" or "only five people in the world can answer"?
Take your pick, ladies.
Second, are we going to end this long-tired cliche of someone proving their skills in indisputable manner only for some rando to come and dispute it anyway? Another student no less, and not even the highest ranked one (not even second highest), and definitely not one of the five people who can answer the question above, so she has no basis to argue. Save for underserved arrogance, that is.
Third, poor hero Laius must be spinning in his grave over and over given the state of his kingdom. He might have drilled a hole to the planet core by now.