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  9. Q50

IBPS PO 2011 · Question 50 of 237

Directions: In the following number series only one number is wrong. Find out the wrong number. 7 12 40 222 1742 17390 208608

  1. A7
  2. B12
  3. C40
  4. D1742Correct
  5. E208608

Answer: D. 1742

Explanation

(7-1)  2 = 12 (12 – 2)  = 12 (40 – 3)  6 = 222 (222 – 4)  8 = 1744 (1744 – 5)  10 = 17390 (17390 – 6)  12 = 208608

Source: IBPS Common Written Exam PO/MT September 2011 (exampapers247 PDF compilation) · reliable-secondary

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