Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.
Can you deduce which Olympic athletics events are represented by the graphs?
This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
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.
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?
Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?
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?
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?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?
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?