If SISTER is RHRSDQ — Coding & Decoding Aptitude Question
If SISTER is RHRSDQ: In a certain code SISTER is written as RHRSDQ. How is UNCLE written? Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 55 seconds
Question
In a certain code SISTER is written as RHRSDQ. How is UNCLE written?
Options
- TMBKD
- TMBLD
- TNBKD
- VOBKD
Show the answer and the worked solution
Correct answer: A. TMBKD
Worked solution
- The shift is −1 on every letter.
- U→T, N→M, C→B, L→K, E→D.
- The code is TMBKD.
Answer: TMBKD.
The idea
Backward shifts are as common as forward ones. Confirm the direction on the first two letters before continuing.
Shortcut. Letters 2 and 4 settle it: N−1 = M and L−1 = K. TMBKD is the only option with both; VOBKD shifts forward and goes at a glance.
Common trap. "TMBLD" — leaving the fourth letter L unchanged in the middle of a run of −1 shifts; L − 1 = K.