I think the "not human" element is worthy of evaluation. Perhaps there is some AI or a chip or something else involved because, as you mentioned previously, one does not just go in and sit for an exam they have not prepared for. Alternatively, we might possibly get a clue by looking at the child prodigies: those adolescents graduating from college well before they should have finished middle school. I think I have even seen a few 9 and 10 year olds accomplishing such great feats. Something is definitely afoot.