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  9. Q1

IBPS PO 2021 · Question 1 of 28

Directions (1 - 5): What should come in place of the question mark (?) in the following number series? 1. 15 23 39 71 ? 261

Number Series

  1. A147
  2. B121
  3. C149
  4. D135Correct
  5. ENone of the above

Answer: D. 135

Explanation

Series is based on, +8, +16, +32, +64, ……. And so on. Next number = 71 + 64 = 135

Source: IBPS PO Prelims 2021 Memory Based Question Paper with Answers (jagranjosh) · memory-based

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