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Two Clocks

These clocks have only one hand, but can you work out what time they are showing from the information?

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It's a Fence!

In this challenge, you will work in a group to investigate circular fences enclosing trees that are planted in square or triangular arrangements.

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Counting Cogs

Which pairs of cogs let the coloured tooth touch every tooth on the other cog? Which pairs do not let this happen? Why?

Sorting the Numbers

Stage: 1 and 2 Challenge Level: Challenge Level:1
What patterns or relationships have you come across?
Why are these relationships occurring?
What happens when you rotate the smaller/larger square?
What happens when you shift the smaller/larger square up or down?