In a certain code, the word LOGIC is written by shifting each letter forward by its own position in the word, so L moves one, O moves two and so on. The first three letters become
Correct answer: A. MQJ
- A. MQJ
- B. MPJ
- C. NQK
- D. MQI
Explanation
L shifted forward by one gives M, O shifted by two gives Q, and G shifted by three gives J. Variable shifts of this kind are harder than a uniform Caesar shift and must be worked letter by letter. Writing the position number above each letter before shifting keeps the count straight.
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Coding and decoding questions replace letters, numbers, words or symbols with another pattern and ask you to identify the rule or decode a new item. Methods include alphabet positions, shifts, reversals, substitution, rearrangement, numerical values and separate rules for different parts of a code.
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