Multiple choice

In the given number series, a term is wrong. Find the wrong term in the given wrong number series. 11, 17, 35, 67, 144, 287

  1. 11

  2. 17

  3. 67

  4. 35

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is: ×2, ×2+1, ×2-1, ×2-1, ×2-1. Starting with 11: 11×2=22 (should be 17, error here), 17×2+1=35, 35×2-1=69 (but we have 67), 69×2-1=137 (but we have 144), 137×2-1=273 (but we have 287). The term 35 breaks the established pattern and should be 22. Alternatively, checking differences: 6, 18, 32, 77, 143 - no clear pattern. The series likely should be 11, 23, 35, 67, 135, 267 or 11, 22, 45, 89, 177, 353.

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