Once you have solved a problem it's instructive to try to think of another
(perhaps better?) method of solution. On one famous occasion I
did not expect different methods but two school students sent in not 2 but 8
different solutions of the same problem. Not content with that these two
students then generalised the problem.
Can you beat that? I expect their teacher at Madras College will remember it.
Perhaps that school can score again, but what about other schools?
This is a challenge calling for the combined efforts of a group of
students or a whole class.