Difficulty: Medium
Correct Answer: 8193
Explanation:
Introduction / Context:This is a classic coding-decoding question based on a fixed substitution mapping between letters and digits. You must infer the digit corresponding to each letter from the given coded words, and then use that mapping to encode a new word.
Given Data / Assumptions:
Concept / Approach:Create a letter-to-digit dictionary from the examples. Use common letters across examples (like E) to confirm consistency. Then encode each letter of WORM in order.
Step-by-Step Solution: From FRAME → 79635: F=7, R=9, A=6, M=3, E=5 From TOWEL → 21854: T=2, O=1, W=8, E=5, L=4 Notice E=5 appears in both, confirming mapping consistency. Now encode WORM: W = 8 O = 1 R = 9 M = 3 So WORM → 8193.
Verification / Alternative check:Cross-check: R and M were obtained from FRAME, while W and O were obtained from TOWEL. Since all required letters exist in the mapping and E was consistent across samples, 8193 is reliable.
Why Other Options Are Wrong: 9183: swaps W and R positions incorrectly. 9376: uses digits not mapped to WORM correctly. 1593: starts with O instead of W. 8139: misplaces R and M digits.
Common Pitfalls:Reading digits in wrong order, mixing mappings between letters, or assuming digits represent positions rather than substitutions are common mistakes.
Final Answer:8193
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