Difficulty: Medium
Correct Answer: 2809
Explanation:
Introduction / Context:The given numbers are perfect squares that align with successive primes: 23^2=529, 29^2=841, 31^2=961, 37^2=1369, 41^2=1681, 43^2=1849. The natural continuation would be 47^2=2209, followed by 53^2=2809, etc. Since 2209 is not among the options provided, we select the next prime square that is present.
Given Data / Assumptions:
Concept / Approach:Under the Recovery-First policy, preserve the “prime squares” rule and pick the next available prime’s square from the choices.
Step-by-Step Solution:
Next primes after 43 are 47, 53, 59, …Among options, 2809 = 53^2 is the earliest prime square offered.Verification / Alternative check:All listed terms are squares of primes; 2809 maintains that property and minimal forward jump given the choices.
Why Other Options Are Wrong:
2601=51^2 and 3249=57^2 are not prime squares; 3481=59^2 skips further ahead than needed.Common Pitfalls:Insisting on 47^2; when the exact continuation is absent from choices, select the nearest valid continuation consistent with the rule.
Final Answer:2809
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