You'll be able to tell if somethings wrong. It should be fairly obvious. A contradiction or inconsistency or whatever. Cause if it was a (consistent) numerical error then they would just let it slide and alter the answers (obviously lol)..
I am betting if there is an error, it is on an equilibrium MC question, with two right answers or no right answers or something...
I don't think they'd do anything if there were two correct answers. It still has a chance of testing knowledge (and fooling people) - fulfilling its original purpose. It's more likely that there's no correct answers. Imagine if they didn't pick it up if this is the case.. I can imagine how long I'd spend thinking wth? getting stressed and I think it would put me off a bit for the rest of the exam >.<
Yeah, one with no right answers would be most likely. This would throw me and create unnecessary stress.
If it is an error in Short Answer, then everything will just be fucked...