Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?
Are these games fair? How can you tell?
Find the frequency distribution for ordinary English, and use it to help you crack the code.
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
Can you do a little mathematical detective work to figure out which number has been wiped out?