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We had very few ideas sent in but it seems that most pupils went on to the other challenge focussed on $28$: $28$ and It's Onwards and Upwards.
Matthew wrote the following and sent in the picture to go with it:
and Emma wrote:
Six new homes are being built! They can be detached, semi-detached or terraced houses. How many different combinations of these can you find?
Start with four numbers at the corners of a square and put the total of two corners in the middle of that side. Keep going... Can you estimate what the size of the last four numbers will be?
This challenge is to design different step arrangements, which must go along a distance of 6 on the steps and must end up at 6 high.