Difficulty: Hard
Correct Answer: 2824
Explanation:
Introduction / Context:“Find the wrong term” problems require detecting a clean rule that all but one term obeys. A neat and test-friendly rule here is adding consecutive odd cubes to progress through the sequence, a variant that rapidly increases numbers while staying simple to verify.
Given Data / Assumptions:
Concept / Approach:Check each step against the odd-cube increments; any single mismatch flags the wrong term, which we minimally correct under the Recovery-First policy.
Step-by-Step Solution:
274 + 3^3 = 274 + 27 = 301 ✓301 + 5^3 = 301 + 125 = 426 ✓426 + 7^3 = 426 + 343 = 769 ✓769 + 9^3 = 769 + 729 = 1498 ✓1498 + 11^3 = 1498 + 1331 = 2829 ✗ (listed as 2824 → off by −5)Continuing would be 2829 + 13^3 = 2829 + 2197 = 5026 ✓Verification / Alternative check:The sequence is perfectly consistent if 2824 is replaced by 2829 (i.e., +11^3). All other steps check out exactly.
Why Other Options Are Wrong:
301, 426, 769 conform to +27, +125, +343 respectively; 2824 alone breaks the +1331 step.Common Pitfalls:Missing that both 5026 and earlier terms still fit the odd-cube rule if the single typo is corrected.
Final Answer:2824
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