If ZERO is encoded as ADSN, then how do you encode STOP?
Mental Ability & Logical Reasoning ·Previously asked in UPSC Civil Services Examination 2026
View the full solved paper: GS Paper II
Question
If ZERO is encoded as ADSN, then how do you encode STOP?
- A. SPOT
- B. TSPO (Correct answer)
- C. TSOP
- D. POST
Correct Answer
Option B — TSPO
Detailed Solution & Explanation
The correct answer is Option B (TSPO).
Key Points
- ZERO → ADSN uses an alternating shift +1, −1, +1, −1: Z+1=A, E−1=D, R+1=S, O−1=N.
- Apply the same to STOP: S+1=T, T−1=S, O+1=P, P−1=O → TSPO.
Additional Information
- Spotting the alternating forward/backward shift is the trick; it gives Option B.