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Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.

Looking at small values of functions. Motivating the existence of the Maclaurin expansion.

What can you say about the lengths of the sides of a quadrilateral whose vertices are on a unit circle?

What fractions can you divide the diagonal of a square into by simple folding?

Can you find a way of predicting the value of large square numbers with the help of our power modulo calculator?

Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Choose any three by three square of dates on a calendar page...