Dave Tweed wrote:
> >
> > Maybe I misread the posting, I thought it was
>> across a major diagonal.
>
> So, what's the answer for the major diagonal?
> (and what's the trick?)

R=5/6 OM
I=6/5 A
(If I'm not mistaken)
It was simplest exam question, when I entered
Institute of Phisics & Technology after school.
 Some sort of symmetry, enabling to connect
some points.

   Mike.

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