One way of writing a word in a secret code is to write the difference of the values of each letter compared to the next (including negative numbers if the first letter in a pair has a larger value than the second)
For example the word AREA would be 17,-13,-4.
However many other sets of four letters would also have this same three-numbered cipher.
The following cipher could only be one possible nine-letter word. What is it?
-2, -17, 15, -11, 21, -17, 12, -8
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Monday, July 2, 2018
"As an extension activity: Which other words can you find that will create unique ciphers?
For more activities like this see the Code Cracking presentation and related challenges."
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