@Noggin @Kaarme
I think he's honest enough to make it a possible test, since he was willing to take on a couple. He just made it a bit too difficult.
Tbh I'd guess he more or less picked things the current members could handle, but only them. So ten questions, one success is enough, but many questions are written in foreign languages and the answers might be considered state secrets or similarly hard to get by normally.
And in honor of Vacs, one of the questions is "practical exam, get me to drop my staff in a duel". XD
(And the tenth question from himself, that might well be something long lost - or just his true age.)
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Although Kaarme's suggestion does have a nice ring to it. Maybe if the test was administered in a "zone of truth" or something to bring out the applicants true intention.