Multiple choice

Find the wrong number in the given series. $19,28,39,52,67,84,102$

  1. $84$
  2. $67$
  3. $52$
  4. $102$
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D Correct answer
Explanation

Find the pattern: differences are 9, 11, 13, 15, 17, 18. The first five differences increase by 2 (consecutive odd numbers). The difference after 67 should be 17, giving 84. But the next difference shown is 18, not 17. Also, continuing the pattern: 84 + 17 = 101, not 102. The number 102 breaks the pattern.

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