Find the odd 4-letter mixed-case block (+1, −3, +1 signature): Choose the option that does not follow “+1, −3, +1”.
Verbal Reasoning
Classification
Difficulty: Medium
Choose an option
-
ACdaB
-
BVwtU
-
CLmjK
-
DRsqP
Answer
Correct Answer: RsqP
Explanation
Introduction / Context:Adding case variety can disguise a simple numeric signature. Treat upper and lower case as the same positions and check a three-step pattern such as “+1, −3, +1”.
Given Data / Assumptions:
- CdaB: C→d (+1), d→a (−3), a→B (+1) → fits.
- VwtU: V→w (+1), w→t (−3), t→U (+1) → fits.
- LmjK: L→m (+1), m→j (−3), j→K (+1) → fits.
- RsqP: R→s (+1), s→q (−2), q→P (−1) → breaks.
Concept / Approach:Compute successive differences ignoring case. The outlier fails either the sign sequence or the magnitudes.
Step-by-Step Solution:
1) Translate to indices.2) Check for +1, then −3, then +1.3) “RsqP” yields (+1, −2, −1), so it is odd.Verification / Alternative check:The first three share both the sign pattern and magnitudes; only the fourth diverges twice.
Why Other Options Are Wrong:They conform to the full signature, not just parts of it.
Common Pitfalls:Ensure you keep the order and signs; mixing them reverses the logic.
Final Answer:RsqP