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In a Magic Square all the rows, columns and diagonals add to the 'Magic Constant'. How would you change the magic constant of this square?

Which parts of these framework bridges are in tension and which parts are in compression?

In this investigation, you must try to make houses using cubes. If the base must not spill over 4 squares and you have 7 cubes which stand for 7 rooms, what different designs can you come up with?

Investigate different ways of making £5 at Charlie's bank.

Manufacturers need to minimise the amount of material used to make their product. What is the best cross-section for a gutter?

This problem is about investigating whether it is possible to start at one vertex of a platonic solid and visit every other vertex once only returning to the vertex you started at.