This quiz is all about Quantitative Slam bidding. Basically, it's about reaching No-trump slams when your side has 33 points or more. To do this, one of your partnership may well bid 4NT to encourage partner to bid 6NT (or to Pass if he feels like chickening out). The problem is that players often know about the Blackwood convention when 4NT asks for Aces and confusion reigns over whether 4NT is Ace-asking or not. It is simple, really (!) If your side has agreed a trump suit then 4NT is Blackwood. If not (or if you've only bid No-trumps) then it isn't.
Let's see how you get on with these hands...