Substitution and Transposition all in one! How fiendish can these codes get?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
Here is the start of a six-part challenge. Can you get to the end and crack the final message?
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?
Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?
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.
Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?
Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.
How do decisions about scoring affect who wins a combined event such as the decathlon?
This problem offers you two ways to test reactions - use them to
investigate your ideas about speeds of reaction.
How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?
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?
Can you deduce which Olympic athletics events are represented by the graphs?