Reversed, then shifted — Coding & Decoding Aptitude Question
Reversed, then shifted: If COMPUTER is written as RFUVQNPC, how is MEDICINE written? Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Hard
- Time target: 150 seconds
Question
If COMPUTER is written as RFUVQNPC, how is MEDICINE written?
Options
- EOJDJEFM
- EOJDJEFN
- MFEJDJOF
- EOJDIEFM
Show the answer and the worked solution
Correct answer: A. EOJDJEFM
Worked solution
- Reverse COMPUTER to get RETUPMOC.
- Against RFUVQNPC: the first and last letters stay, and every letter between moves +1.
- Reverse MEDICINE to get ENICIDEM.
- Keep E and M, and add one to the rest: E, O, J, D, J, E, F, M.
- The code is EOJDJEFM.
Answer: EOJDJEFM.
The idea
When no shift fits, reverse the word and compare again. Two-step codes almost always combine a reversal with a small shift.
Shortcut. The code must start with MEDICINE's last letter (E) and end with its first (M), which removes MFEJDJOF and EOJDJEFN. Of the two left, the fifth letter of the reversed word is I, so its code is J.
Common trap. "MFEJDJOF" — applying the +1 shift but forgetting the reversal; RFUVQNPC begins with COMPUTER's last letter R, so the code must begin with MEDICINE's last letter E.