Collecting data

How can we find out answers to questions like this if people often lie?

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

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?

Terry and Ali are playing a game with three balls. Is it fair that Terry wins when the middle ball is red?

In this problem you will do your own poll to find out whether your friends think two squares on a board are the same colour or not.

This activity asks you to collect information about the birds you see in the garden. Are there patterns in the data or do the birds seem to visit randomly?