Coding Set – LR
In a coding operation C0, SMART is changed to UQBLT and DROP is changed to OPQE.
The coding operation works as follows:
- Odd letter of the word is replaced by the letter that follows it (as per the alphabetical sequence)
- Even letter of the word is replaced with the one that immediately precedes the letter (in the alphabetical sequence)
- The word is written in reverse order to arrive at the code.
Similarly, for other operations of the series, C1,C2,C3….,Cn each letter is replaced by skipping n letter that precede or follow it.
1. The operations C3C2C0C4 is performed on the word TRUST. What is the output?
a) IHGHI b) HEHGH c)KFEHK d) GEHFG
Sol: d) For C3, we need to skip 3 letter to arrive at the code letter, so the coding would be as shown in the table (the alphabet appearing at odd positions is replaced with the one that is 4th after it, while those appearing at even positions are replaced by the 4th before them).
The word thus formed is read in the reverse direction.
Similarly, we note the output of other coding schemes. The outputs are listed below.
2. The output of the operation C4C2C0C0 is FCHGPC. What is the input?
a)DECIDE b)DICIDE c)DEFINE d) FEINED
Sol. c)
3. What could be the minimum number of operations after which a 8 letter word returns to its initial form?
a)2 b)13 c)26 d)None of these
Sol: Answer is 2, applying C0C0 would return the original word for words with even letters.
4. What could be the minimum number of operations after which a 5 letter word returns to its initial form?
a)2 b)13 c)26 d)None of these
Sol: Answer is 2, applying operations for which the sum of n’s is 25 will return the original word for words with 5 letters. For example C0C24 or C1C23 etc.
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