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Have a look at what happens when you pull a reef knot and a granny knot tight. Which do you think is best for securing things together? Why?

Can you make five differently sized squares from the interactive tangram pieces?

Can you make matrices which will fix one lucky vector and crush another to zero?

How can you time the reaction timer?

Can you hit the target functions using a set of input functions and a little calculus and algebra?

Can you make a curve to match my friend's requirements?

Make a functional window display which will both satisfy the manager and make sense to the shoppers

What biological growth processes can you fit to these graphs?

How many legs do each of these creatures have? How many pairs is that?