Secret Number Codes

To send a secret message to a friend, send the message in code so that no one else can read what it says.


Of course, your friend needs to know how to decode the message, so only the two of you will understand. 

      This simple code changes each letter to number:

      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

To send the message MEET ME AT SIX you write down their numbers instead of the letters:

                 13  5  5  20         13 5         1 20         19  9  24

But clever people might be able to guess this code, so you might want to make yours a little more complicated. See if you can work out what this message mean.

                 14  6  6  21        14 6          2  21        20  6  23  6  15

problem taken from Math*E*Magic, p. 85

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Number-Word Play

 

There is only one number when converted into Roman numerals gives you a common English word. 

What number is it?

More Trivias?

Hint: Roman Numeral Symbol Table

                                 I                         1

                                 V                        5

                                 X                       10

                                 L                       50

                                 C                      100

                                 D                      500

                                 M                   1,000

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