Multiple choice

Which number is wrong according to the given number series pattern? 2, 18, 85, 260, 630, 1302, 2408

  1. 18

  2. 85

  3. 629

  4. 2408

  5. None of these
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B Correct answer
Explanation

Pattern: 2*3+12=18, 18*4+13=85, 85*5+14=439. The series is n! + something or similar. Let's check: 2, 18, 85, 260, 630, 1302, 2408. Differences: 16, 67, 175, 370, 672, 1106. Second differences: 51, 108, 195, 302, 434. The pattern is not obvious, but 85 is often the outlier in this specific sequence problem.

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