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A video is shown of a square with its diagonals marked. The resulting regions are, of course, 25% of the whole square. A motion graphic shows one of the diagonals sliding down a side to rest at the mid-point. What percentage of the whole is each region?

This is an adaptation of a print-based task designed by...

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In this Nuffield ...

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The initial frame of the video shows a toy pony. As time progresses additional ponies are added to the scene. At the end, all of the ponies are taken away. The challenge is to graph the number of ponies in the frame against time. The resulting graph is one with discontinuities.

Ponies in frame video...

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