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Biscuit Decorations

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

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Olympic Rings

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2

Five coloured interlocking rings have been the symbol of the Olympics for nearly one hundred years.

What colours can you see?

You can see the way they interlock if you click here.  

How would you describe the picture?
Can you design your own symbol using five coloured rings?

Other shapes could be linked in a similar way.
Have a go at linking five squares. Make them interesting colours.

 5 squares