Using a one-to-one function encode the word logarithms

Question

A B C D E F G H I  J    K   L   M

1 2 3 4  5 6 7 8 9 10 11 12 13

N   O   P   Q    R   S   T   U   V   W  X   Y   Z

14 15 16 17 18 19 20 21 22 23 24 25 26

Answer 1

These are the capital letters of the English alphabet and the position in that alphabet (from 1 to 26, like ordinal numbers).

 

Here are two one-to-one functions [based on how you read the table]:

 

    f(capital letter) = (number position of a letter in English alphabet)

 

    f(number position of a letter in English alphabet) = capital letter

 

 

Note: this is the starting position of a rotatable decoder ring.

  For fun, watch the Kahn Academy video on Caesar Cipher.

  Also, check out the ASCII character codes used by your computer.