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Solution to Question 4.
Question 4 is an interesting question as we must deduce the only possible way to fill in the grid. This requires a clever perspective at the current setup and the possible match results. We can work out most of B's row before carrying over the result of this to the other rows. Similarly, we can deduce C must draw with A and B to work out the draw column fully. After this, we must refer to the for/against column to deduce the rest of the table. I consider this only half the problem however.
After this we must use the for/against column to fill out the match results which requires some logic that they must be equal before draws are taken into account. Using this logic, it is fairly easy spot the results at a glance.
Final table
Team P W D L F A Pts
A 3 1 1 1 4 4 3
B 3 2 1 0 5 2 5
C 2 0 2 0 4 4 2
D 2 0 0 2 0 3 0
AB 0 - 2
AC 2 - 2
AD 2 - 0
BC 2 - 2
BD 1 - 0