Can you make a set of random data which will fool the computer?
Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?
Like all sports rankings, the cricket ratings involve some maths. In this case, they use a mathematical technique known as exponential weighting. For those who want to know more, read on.
Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?
How do decisions about scoring affect who wins a combined event such as the decathlon?
Here is the start of a six-part challenge. Can you get to the end and crack the final message?
Substitution and Transposition all in one! How fiendish can these codes get?