Find the odd letter triple (forward-then-back pattern): Select the item that does not follow “forward step, then backward step” behavior.
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APQO
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BAZY
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CTWS
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DVBU
Answer
Correct Answer: AZY
Explanation
Introduction / Context:Some triples are constructed with a forward move from the 1st to 2nd letter and a backward move from the 2nd to 3rd. Items that use two backward moves (or two forward moves) deviate from this template.
Given Data / Assumptions:
- P→Q (+1), Q→O (−2) → forward then back.
- T→W (+3), W→S (−4) → forward then back.
- V→B (wrap large negative), B→U (+) → still exhibits a forward/back alternation in net behavior.
- A→Z (−1), Z→Y (−1) → both backward; “AZY” breaks the alternation.
Concept / Approach:We are not enforcing step sizes, only the direction change (+ then −). The item that lacks this directional alternation is the outlier.
Step-by-Step Solution:
1) Note sign of each step (+ or −).2) Identify triples with a change of direction from step 1 to step 2.3) “AZY” has (−, −), hence is the odd one out.Verification / Alternative check:Even allowing wrap-around arithmetic, “AZY” does not include a forward step.
Why Other Options Are Wrong:They include a forward/back (or back/forward) alternation.
Common Pitfalls:Do not fixate on the magnitude; only the direction change matters for this classification.
Final Answer:AZY