When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?
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.
Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.
Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?
This problem offers you two ways to test reactions - use them to
investigate your ideas about speeds of reaction.
How do decisions about scoring affect who wins a combined event such as the decathlon?
Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?
Can you deduce which Olympic athletics events are represented by the graphs?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
You may like to read the article on Morse code before attempting
this question. Morse's letter analysis was done over 150 years ago,
so might there be a better allocation of symbols today?
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?
How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?