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Predict future weather using the probability that tomorrow is wet given today is wet and the probability that tomorrow is wet given that today is dry.

Find the frequency distribution for ordinary English, and use it to help you crack the code.

Engage in a little mathematical detective work to see if you can spot the fakes.

My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?

If you can copy a network without lifting your pen off the paper and without drawing any line twice, then it is traversable. Decide which of these diagrams are traversable.

Charlie likes tablecloths that use as many colours as possible, but insists that his tablecloths have some symmetry. Can you work out how many colours he needs for different tablecloth designs?

Countries from across the world competed in a sports tournament. Can you devise an efficient strategy to work out the order in which they finished?

Can you help the children in Mrs Trimmer's class make different shapes out of a loop of string?

Dotty Six is a simple dice game that you can adapt in many ways.

How many moves does it take to swap over some red and blue frogs? Do you have a method?