Difficulty: Medium
Correct Answer: UTI
Explanation:
Introduction / Context:Some letter-series problems repeatedly peel characters from the left (and eventually from both ends) to expose the inner core of a word. The sequence given is: “ATTRIBUTION” → “TTRIBUTION” → “RIBUTION” → “IBUTI” → ? We must infer a reasonable consistent rule and extrapolate the next inner segment.
Given Data / Assumptions:
Concept / Approach:After successive left trims, the pattern converges toward the middle of “ATTRIBUTION.” The natural continuation after the 5-letter inner core is the 3-letter central core. In “ATTRIBUTION,” the central triad is “UTI.”
Step-by-Step Solution:
Identify the central band: “ATTRIBUTION” has an odd length; its middle around positions 5–9 contains “IBUTI.”The next tighter inner band is the exact middle 3 letters: “UTI.”Thus the next term is “UTI.”Verification / Alternative check:Shrinking window lengths: full (11) → 10 → 9 → 5 → 3 shows a plausible inward progression; “UTI” is the symmetric core of the word.
Why Other Options Are Wrong:
IBU — a left-biased slice, not the centered triad.UT — only two letters; over-trims.BTU — order scrambled relative to the word.RIBU — four letters and left-shifted; not the tight center.Common Pitfalls:Assuming only left-side deletions throughout; many such series eventually extract exact central substrings.
Final Answer:UTI
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