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Liam from Cummersdale School, Carlisle, Cumbria says:
"I have the answer to your solution for big dog little
dog.
Big Dog has 10 biscuits and Little Dog has 6 biscuits."
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?