Comparing and interpreting data

Where do people fly to from London? What is good and bad about these representations?

"Too much sleep is deadly" proclaimed the newspaper headline. Is this true?

Displaying one-variable and two-variable data can be straightforward; what about three or more?

Guess the Houses game for an adult and child. Can you work out which house your partner has chosen by asking good questions?

Here are the top ten medal winners in the 2012 Olympic Games. How do you think the positions were decided?

Letters have different values in Scrabble - how are they decided upon? And would the values be the same for other languages?

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?

Can you make sense of the charts and diagrams that are created and used by sports competitors, trainers and statisticians?

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?