What does B?+ mean as a grade? I have been wanting to know the answer to this for a very long time but have come up against none. Looking at my undergrad results from a few years ago, one of the assignment marks is down as B?+. What exactly does this mean? Is it somewhere between a B and a B+? I remember hearing it pronounced as "query plus".
As far as I can tell, this is an Oxford (or maybe Oxbridge) thing. 

From Too Many Words – A Life in the Law 8:


  The Oxford system in 1962 marked scripts by classifying students into alpha, beta, gamma, and then, within each class, adding plus or minus, or double plus or minus, or triple plus or minus, and in between using query to further distinguish. So the available range of marks ran downwards – alpha triple plus, alpha double plus query plus, alpha double plus, alpha plus query plus, alpha plus, alpha query plus, alpha, alpha query minus, alpha minus, alpha minus query minus, alpha double minus, alpha double minus query minus, alpha triple minus, alpha beta, beta alpha, beta triple plus etc.


So B?+ is between B+ (which is higher than B?+) and B (lower than B?+).

Other references: Oxbridge: beta-minus-minus