how many are there on the real exam? are they a set number for everyone i.e. 22 or differs and do they get counted in your score at all if you get them right or totally discarded?
It's been rumored that there are 22, but I'm not sure that anyone actually knows.
I don't see it likely that the # fluctuates though, because changing the n-value (# of graded questions) per exam factoring into any one person's score would cause discrepancies / be unfair.