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Many of you sent in your answer to this problem, but very few of you told us how you did the problem. Remember, it is important to tell us what you did to solve the challenge so that someone else could follow it if they were stuck. Georgie C from St George's School did send us details:
Well done, Georgie. Well explained solutions were also sent in by Azure from Hanoi International School and Plum from Ardingly College Junior School.