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I don't think this is cheating at all Mikey! Mikey then realised something else which was also spotted by "N" (he or she didn't give us a full Christian name):
If you draw a mirror line down the middle of the square you will be able to work out what number will be behind each number. You choose a number, then find its mirror on the other side of the line, this 'mirror' number will be the number on the reverse!This is also a very handy method - well noticed. "N" sent an image with the "mirror line" drawn in:
Devonshire Maths Club, Devonshire Primary School have found a pattern which they describe:
St Non's Class at St Mary's in Wales wrote:
We found this problem interesting and challenging.