![In a box](/sites/default/files/styles/medium/public/thumbnails/content-03-06-six2-icon.gif?itok=QusJOsDo)
problem
In a box
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?
![Odds and Evens](/sites/default/files/styles/medium/public/thumbnails/content-id-4308-icon.png?itok=KWAy0vs5)
![Substitution Cipher](/sites/default/files/styles/medium/public/thumbnails/content-id-4957-icon.png?itok=9CmEuTVv)
problem
Substitution Cipher
Find the frequency distribution for ordinary English, and use it to help you crack the code.
![m, m and m](/sites/default/files/styles/medium/public/thumbnails/content-id-6267-icon.png?itok=Q1S8r2JO)
problem
m, m and m
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
![Wipeout](/sites/default/files/styles/medium/public/thumbnails/content-id-10996-icon.png?itok=j3fpxJ14)
problem
Wipeout
Can you do a little mathematical detective work to figure out which number has been wiped out?