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Published on Sep 4, 2013
http://www.mathematicscentre.com/math... Bella, Emma, Amy & Beatrice, Year 6, Camberwell Primary School, describe their insightful algorithm for changing yellow to blue. The problem uses Poly Plugs which have a different colour on each side. The challenge is to begin with four yellow plugs and by turning over all except one on any turn, to change them all to blue. You might like to try it yourself first because it isn't as easy as the girls make it look. Instead of plugs use four scrap of paper with a cross on one side of each. Yellow to Blue derives from Task 132, Red To Blue from Mathematics Task Centre. Find out more at: http://www.mathematicscentre.com/task...