Here's a bit of fun you can have with your mates down the pub using a mobile, or at school with a calculator. It's called THE DEE SHIRT CHALLENGE. Here are the instructions you will need to get them to do....
"Put in the number on Ian Ure's shirt".
"Put in alongside it the number on Claudio Caniggia's shirt".
"Multiply that figure by the number on Billy Steel's shirt".
Ask, "what do they all have in common?"
Then get them to turn the mobile/calculator upside down and read it.
To help you, view the video below...it works!