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ibps-so 2025 · Question 146 of 271

Directions (145-150): In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number. 128, 32, 96, 240, 840, 3780, 20790

  1. A32Correct
  2. B96
  3. C240
  4. D840
  5. E3780

Answer: A. 32

Explanation

Wrong number = 32 Pattern of series – 128 × 0.5 = 64 64 × 1.5 = 96 96 × 2.5 = 240 240 × 3.5 = 840 840 × 4.5 = 3780 3780 × 5.5 = 20790 So, 64 should be come in the place of 32.

Source: IBPS SO Prelims Memory Based 2025 (held 30 Aug 2025, Shift 1) - BankersAdda · memory-based

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