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# Enemy message

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Enemy message [#permalink]  25 Mar 2004, 17:43
A cryptographer has intercepted an enemy message that is in code. He knows that the code is a simple substitute of numbers for letters. Which of the following would be least helpful in breaking the code?

A) Knowing the frequency with which the vowels of the language are used
B) Knowing the frequency with which two vowels apear together
C) Knowing the frequency with which odd numbers appear relative to even numbers in the message
D) Knowing conjugation of the verb to be in the language on which the code is based
E) Knowing every word in the language that begins with R
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IMO D is best. D does not give any hint to what the words may possibly be. All other options may help in deciphering the message by giving specific details on the code patterns.
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Paul

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C is the best. The argument says that the code is in LETTERS and Needs to be replaced by NUMBERS. So any information regarding the Letters is useful as it can be deciphered by substituting with NUMBERS. BUT if the code itself is in a cobination of NUMBERS, Then it is tough to decipher the code.
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I will go with C on this one.

My logic is that since even and odd numbers are mapped to different characters. Knowing the frequency of even and odd numbers cannot give you any information. Knowledge verb usages and forms does give you information about the language. All other choices talk about some aspect of the language. Only C deals with just numbers.

Last edited by anandnk on 25 Mar 2004, 18:41, edited 1 time in total.
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Monarc, once again you are right
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Paul

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