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Round and Round the Circle

What happens if you join every second point on this circle? How about every third point? Try with different steps and see if you can predict what will happen.

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Making Cuboids

Let's say you can only use two different lengths - 2 units and 4 units. Using just these 2 lengths as the edges how many different cuboids can you make?

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Quadrilaterals

How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?

Orange Drink

Age 7 to 11 Challenge Level:

How much water is needed to make one glass of the drink?
How many glasses of drink are there in a litre? In $10$ litres?
What fraction of the made-up drink is water?