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Well done all of you who sent in these solutions. I am very pleased with the ways that you went about doing this challenge and the different ways you showed your results.
Pupils from Chesterbrook Academy sent in this,
Then someone else from the same school added,
Here's Emma's Solution that she sent in in a doc.form:
Andy sent in the following. I liked his method for finding a solution by starting with the special diagonal and then filling in. I've not come across this method before. This solution has the added attraction (perhaps difficulty) that the diagonals also have to obey the rule!
The answer isSusie sent in these comments accompanied by the Spreadsheet. This is the first time, out of hundreds of times, that I've been presented with this method of finding a solution.Well done Susie, (from Cathedral School, I wonder which one?).
I made a 4 by 4 square and wrote in each square pairs of letters AA, AB, AC to mean the colours of cups and saucers. I used Excel.These four solutions could be viewed as:-
How can you put five cereal packets together to make different shapes if you must put them face-to-face?