Shift by position — Coding & Decoding Aptitude Question
Shift by position: If ACE is coded as BEH, how is BUS coded? Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Hard
- Time target: 75 seconds
Question
If ACE is coded as BEH, how is BUS coded?
Options
- CWU
- DWV
- CWV
- CVV
Show the answer and the worked solution
Correct answer: C. CWV
Worked solution
- A → B is +1, C → E is +2, E → H is +3: the shift equals the letter's position in the word.
- B + 1 = C, U + 2 = W, S + 3 = V.
- BUS becomes CWV.
Answer: CWV.
The idea
When the shift is not constant, check whether it increases with position (+1, +2, +3) or alternates in sign. Write the shifts under the letters before guessing.
Shortcut. Test one letter per option: S + 3 = V drops CWU, B + 1 = C drops DWV, U + 2 = W drops CVV — leaving CWV.
Common trap. "CWU" — carrying the middle shift of +2 into the third letter; the shifts rise +1, +2, +3, so S → V.