If ROBUST is coded as QNATRS in a certain language, which word will be coded as ZXCMP?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → AYDNQ
The rule is read from the given word and then applied to the code. In ROBUST → QNATRS, each letter is replaced by the letter just before it in the alphabet:
R→Q, O→N, B→A, U→T, S→R, T→S: every letter moves 1 place back
To go from a code back to the word, each letter of ZXCMP is moved 1 place forward:
Z→A, X→Y, C→D, M→N, P→Q, giving AYDNQ
Z moves forward to A because the alphabet wraps round: in the code, the letter before A is Z.