Multiple choice

Find the wrong number in the given series? 291, 147, 75, 39, 22, 12, 7.5

  1. 147

  2. 75

  3. 39

  4. 22

  5. 7.5
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Apply the pattern: ÷2 - 1.5 repeatedly. 291→147→75→39→?→12→7.5. Following this: 39÷2-1.5 = 19.5-1.5 = 18, not 22. Continuing: 18÷2-1.5 = 9-1.5 = 7.5. So 22 breaks the pattern and should be 18.

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