Opposite letters of the alphabet — Aptitude Question
Opposite letters of the alphabet: If ACT is coded as ZXG, how is BAD coded? (Each letter is replaced by its… Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 90 seconds
Question
If ACT is coded as ZXG, how is BAD coded? (Each letter is replaced by its opposite in the alphabet.)
Options
- YZW
- YZX
- ZYW
- YAW
Show the answer and the worked solution
Correct answer: A. YZW
Worked solution
- Opposite pairs: A↔Z, B↔Y, C↔X, D↔W.
- Check: A→Z, C→X, T→G ✓ (T is 20, and 27 − 20 = 7 = G).
- BAD → B→Y, A→Z, D→W = YZW.
Answer: YZW.
The idea
The opposite of the nth letter is the (27 − n)th. Remembering the pairs A-Z, E-V, J-Q, M-N makes this quick.
Shortcut. The example already shows A→Z. B and D are one and three steps in from A, so their opposites are one and three steps back from Z: Y and W, giving YZW.
Common trap. "YZX" — stopping one short for D and taking X, which is C's opposite; D is the 4th letter, so its opposite is the 4th from the end, W.