Difficulty: Easy
Correct Answer: 248
Explanation:
Introduction / Context:We determine the rule that maps 149 to 238, then apply it to 159 to find the unknown value.
Given Data / Assumptions:149 → 238 implies an additive increment of 89 (238 − 149 = 89). We assume the same increment applies in the second pair.
Concept / Approach:Constant-difference mappings are common in two-step analogies when only one example is provided on the left. Using +89 on 159 should yield the answer if the rule is consistent.
Step-by-Step Solution:
1) Δ = 238 − 149 = 89. 2) 159 + 89 = 248. 3) 248 is present in the choices.Verification / Alternative check:Other operations (e.g., fixed ratio) do not align as cleanly with 149 → 238.
Why Other Options Are Wrong:They correspond to different increments that do not match the left-hand mapping.
Common Pitfalls:Searching for a complicated digit-function when a simple constant increment fits.
Final Answer:248
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