On Fri, 5 Apr 1996, Philip Mak wrote:

An observation about the other part of the end when Usagi said she got 
points from the extra credit questions by circling them at random... that 
is unlikely; in Japan when there are multiple choice questions points are 
deducted for questions that are answered wrong. If Usagi had tried to do 
questions by guessing she would have probably LOST points instead of 
gaining points.

The point was, she got VERY lucky.