Multiple choice

Which number is wrong according to the given number series pattern? 1, 8, 21, 42, 76, 116, 173

  1. 76

  2. 42

  3. 21

  4. 8

  5. None of these
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A Correct answer
AI explanation

Calculate the differences between consecutive terms to reveal the pattern of the sequence. The first differences are 7, 13, 21, 34, 40, and 57, and the second differences are 6, 8, 13, 6, and 17. If the incorrect term 76 is replaced by 71, the second differences become 6, 8, 10, 12, and 14, revealing a consistent increasing pattern of even numbers.

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