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Join the midpoints of a quadrilateral to get a new quadrilateral. What is special about it?

There are lots of different methods to find out what the shapes are worth - how many can you find?

Can you make sense of information about trees in order to maximise the profits of a forestry company?

Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?

Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?

How can visual patterns be used to prove sums of series?

Can you work out the fraction of the original triangle that is covered by the inner triangle?

The items in the shopping basket add and multiply to give the same amount. What could their prices be?