problem Favourite Olympic triathlon Age 14 to 16 Challenge level Is it the fastest swimmer, the fastest runner or the fastest cyclist who wins the Olympic Triathlon?
problem Favourite Which list is which? Age 14 to 16 Challenge level Six samples were taken from two distributions but they got muddled up. Can you work out which list is which?
problem Favourite Statistical shorts Age 11 to 16 Challenge level Can you decide whether these short statistical statements are always, sometimes or never true?
problem Favourite Who's the best? Age 11 to 14 Challenge level Which countries have the most naturally athletic populations?
problem Favourite Olympic records Age 11 to 14 Challenge level Can you deduce which Olympic athletics events are represented by the graphs?
problem Favourite Litov's mean value theorem Age 11 to 14 Challenge level Start with two numbers and generate a sequence where the next number is the mean of the last two numbers...
problem Favourite Substitution cipher Age 11 to 14 Challenge level Find the frequency distribution for ordinary English, and use it to help you crack the code.
problem Favourite Very old man Age 16 to 18 Challenge level Is the age of this very old man statistically believable?
problem Favourite In the bag Age 11 to 14 Challenge level Can you guess the colours of the 10 marbles in the bag? Can you develop an effective strategy for reaching 1000 points in the least number of rounds?
problem Favourite Reaction timer Age 11 to 14 Challenge level This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.