Mathematical Reasoning - Coding Decoding

1. If ‘BELONGINGS’ is coded as ‘TABLESTESF’, then how will you code ‘LINEN’?

  • Option : A
  • Explanation : The coding is done as follows:
    Coding Decoding
    Accordingly, the code for LINEN is BTEAE.
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2. If ‘POSTED’ is coded as ‘DETSOP’, then how will you code ‘SPEED’?

  • Option : A
  • Explanation : By careful observation, we can say that the letters have been written in the reverse order. Hence, SPEED will be written DEEPS; therefore, (a) is the answer.
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3. If ‘GREET’ is coded as ‘FQDDS’, then ‘CDDO’ stands for

  • Option : B
  • Explanation : Here, it is −1 for each letter of the word ‘GREET’.
    Coding Decoding
    CDDO itself is a code. To find out what it stands for, we have to add +1 to the alphabets to get back the original word.
    Coding Decoding
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4. If ‘PAT’ is coded as ‘QRBCUV’, then how will you code ‘GRACE’?

  • Option : A
  • Explanation : The pattern of coding is such that each letter has been allotted the value of 2 letters following the sequence, i.e., A = BC, B = CD, C = DE, etc. Hence, the word GRACE will be coded as ‘HISTBCDEFG’. Therefore, option (a) is the answer.
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5. If ‘EGHJKMKM’ is the code for ‘FILL’, then how will you decode ‘EGDFDFKM’?

  • Option : B
  • Explanation : Refer to alphabet series in Table 5.1 starting from the L.H.S. pair, E is the antecedent of F and G is the precedent of F. We get EG as code for F; HJ as code for I; and so on.
    Similarly, EGDFDFKM is the code for FEEL. F is coded as EG with its precedent and antecedent letters. Similarly, ‘I’ is coded as HJ and L as KM. Hence, EGDFDFKM stands for FEEL. Therefore, option (b) is the correct answer.
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