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CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out

In a certain code, the word CAB is written as 312 using the rule A=1, B=2, C=3, and so on. Using the same rule, what is the code for the word FEED?

FEED is coded as 6554, because each letter is replaced by its alphabetical position: F is 6, E is 5, E is 5 and D is 4. Writing these positions in order gives 6554.

  1. A6554
  2. B6544Correct
  3. C5644
  4. D6455

Explanation

Each letter is replaced by its position in the alphabet: F=6, E=5, E=5, D=4. Joined together this gives 6554 for FEED. Wait, check the order: F, E, E, D gives 6, 5, 5, 4, so the code is 6554. Option 6544 wrongly uses D for the second E.

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