Multiple choice

Find the wrong term in the following number series. $8 \quad 8.5 \quad 11.5 \quad 14 \quad 17$

  1. $8$
  2. $8.5$
  3. $11.5$
  4. $14$
  5. $17$
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B Correct answer
Explanation

Calculate differences: 8.5 - 8 = 0.5, 11.5 - 8.5 = 3, 14 - 11.5 = 2.5, 17 - 14 = 3. The pattern alternates between +3 and +0.5. Starting from 8, the sequence should be: 8 + 3 = 11, 11 + 0.5 = 11.5, 11.5 + 3 = 14.5, 14.5 + 0.5 = 15. The term 8.5 breaks this pattern. Option B (8.5) is correct as the wrong term.

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