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You could try writing the letters round in a circle so that it is easier to count forwards and backwards. Use the wheel we have created to help you.
I was looking at the number plate of a car parked outside. Using my special code S208VBJ adds to 65. Can you crack my code and use it to find out what both of these number plates add up to?
A case is found with a combination lock. There is one clue about the number needed to open the case. Can you find the number and open the case?
The Enigma Project's James Grime has created a video code challenge. Watch it here!