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Tangram Paradox

How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!

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Teddy Town

There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

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Overlapping Circles

What shaped overlaps can you make with two circles which are the same size? What shapes are 'left over'? What shapes can you make when the circles are different sizes?

Rod Ratios

Age 7 to 11 Challenge Level:

Can you use the interactivity to help you? You can choose the correct length rods from the interactivity by matching their colours.
Perhaps you could line up white rods alongside the coloured rods to help work out their lengths and then their relative ratios.
You could also use the grid lines to find the lengths of the rods.