Letters standing for digits — Aptitude Question
Letters standing for digits: In a code, ROSE is written as 6821, CHAIR as 73456 and PREACH as 961473. Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Hard
- Time target: 135 seconds
Question
In a code, ROSE is written as 6821, CHAIR as 73456 and PREACH as 961473. How is SEARCH written?
Options
- 214673
- 214763
- 216473
- 241673
Show the answer and the worked solution
Correct answer: A. 214673
Worked solution
- ROSE → R=6, O=8, S=2, E=1.
- CHAIR → C=7, H=3, A=4, I=5, R=6 (consistent).
- PREACH → P=9, R=6, E=1, A=4, C=7, H=3 (consistent).
- SEARCH = S,E,A,R,C,H = 2,1,4,6,7,3 = 214673.
Answer: 214673.
The idea
Write the table out and check every letter that appears twice for consistency. That cross-check is what confirms the mapping is right.
Shortcut. SEARCH contains PREACH's 'EA' and ends in its 'CH', and PREACH is 961473, so the code must contain 14 and end in 73. Only 214673 does both.
Common trap. "214763" — swapping R and C near the end, as if the word were SEACRH; R = 6 comes before C = 7.